Top 9 Best Portable Ice Maker Review-Buyer Guide 2020

So, ice matters to you. And you are looking to buy a good ice maker?

A portable ice maker is mainly designed for those who are always on the go. You may argue that it is quite convenient to set on a kitchen counter. Yes, it is. In fact, it also offers several advantages over making ice with a freezer in a refrigerator. But, people keep these handy machines to make sure they do not run out of supply no matter where they are.

As you would know, the suburb next to the forest you are camping at may not have a convenience store where good quality ice is sold. And, you wouldn’t want to miss out on your favorite ice crushed tea or your cocktail with the cube.

What to look for in Portable Ice Maker?

A good one should:

• Be easy to set up
• Be able to make ice within a short span of time
• Be smart enough to allow you to choose ice cubes of different sizes
• Be equipped with smart and intelligent controls that alert you when the ice is ready or the water level is low
• Be handy to carry around on the street without being too heavy
• Be easy to operate- as easy as pouring water into the reservoir and turning on the power.
• Be able to produce good quality ice consistently for a long duration of time.
• Be reasonably priced and promise efficient and reliable operation.
• Be designed to go with the kitchen counters.
• Have intelligent ice making mechanisms such as a drain spout as well as a smart cleaning cycle to help prepare for making your first batch of ice.
• Be solid enough to be used everywhere.

BEST PORTABLE ICE MAKER – TOP 10 OF 2020

Let us take a closer look at portable appliances currently available on the market.

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Igloo ICE103 CounterTop Ice Maker

1. NewAir AI-100S Portable Ice Maker

The NewAir AI-100S Portable Ice Maker is a compact ice maker. There is no need for permanent installation, and it is perfect for any outdoor games and pool parties. This device can also be used to make frozen drinks. It produces ice cubes in three different sizes and can give you up to 28 pounds of ice every day.

The AI-100S is made entirely from superior quality stainless steel; therefore, it is not just elegant but also extremely durable. It can easily be kept on the countertop, and because of its compact nature, it won’t hog any more space than is necessary. This model has two warning indicator lights, soft touch keys and an LCD screen with bright backlight. It also offers a side mounted removable bin for cleaning purposes.

The NewAir AI-1005 weighs 31 pounds and measures 12 x 14 x 15 inches respectively.

Technical Details

• Sleek and compact design
• Includes an ice scoop
• Easily portable
• Has a side-mounted bin to empty unused water
• Easy-to-use control panel with indicator lights
• Fast Ice Production – produces 9 ice cubes in less than 15 minutes!
• Wattage: 400 W
• Voltage: 115 V
• Ice Sizes: 3 – small, medium, and large
• Warranty: 1-year manufacturer’s warranty
• Indicator lights to indicate when the ice basket is full and water reservoir is empty
• Doesn’t require draining at all making the unit portable

NewAir AI-100S Portable Ice Maker can serve you not just ice cubes but also your favorite frozen drinks within few minutes. According to all those who’ve used it, buying this product is definitely a worthwhile investment. Without hesitation, we give you the green signal to bring home the AI-100S.

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2. NewAir AI-100R Portable Icemaker Reviews

The NewAir AI-100R Portable Icemaker that provides enough ice to easily supply any indoor or outdoor occasion. It is compact and light (just 30 pounds) and can fit nicely on most countertops without taking up too much space. The bright red unit adds a splash of color to any kitchen. It offers a drain that is mounted on the side of the unit so that excess water can be easily cleaned out. The NewAir AI-100R Portable Icemaker provides the user with ice fast; with the first cubes ready at just 6-15 minutes. This unit can produce up to 28 pounds of ice per day. We found Amazon.com to have the best prices on the NewAir AI-100R Portable Ice maker; you can Click Here to check it out.

NewAir AI-100R Portable Icemaker Features

• FREE GROUND SHIPPING
• Provides ice within 15 minutes of operation
• Produces up to 28 pounds of ice per day- perfect for parties, BBQ’s, graduations, etc.
• Contemporary red color is sure to compliment any décor
• Cleaning is easy with the side-mounting drain

NewAir AI-100R Portable Icemaker Review Summary

There are a few users who have claimed that they were unable to get assistance from customer service for any problems they encountered. However, most of the users who had issues said that customer service replaced their units and submitted a refund automatically.

Overall, most users feel like they got a great bargain for the cost. The ice maker does exactly as advertised and is extremely handy to have for everything from everyday use to parties and get-togethers. Customers love the bright red color that the NewAir AI-100R Portable Icemaker unit brings to the kitchen.

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3. NewAir AI100SS Portable Ice Maker Reviews

The NewAir AI100SS Portable Ice Maker makes ice cubes in as little as six minutes. This container is stainless steel and makes 28 pounds of ice in a 24 hour period. This countertop ice maker does not require a water line and can be plugged into a standard household electrical outlet. The appliances small casing is compact enough to sit on the countertop, desktop, or even by the poolside for optimal ice-making convenience. This unit does not require a drain; ice that is not used will naturally melt and pour back into the molds for the next fresh batch of ice.

We found a great price for the NewAir AI100SS on Amazon.com, and this includes free delivery on this product. If you want to check out the latest offers on the NewAir AI100SS then what you will need to do is just visit this link and view the latest offers.

NewAir AI100SS Portable Ice Maker Product

• Starts making ice cubes in a matter of minutes
• Produces up to 28 pounds of ice per day
• Electronic controls make operation extremely easy
• Ideal for the home, office, RVs, boats and more
• Just add water and enjoy ice cubes wherever there is a standard household power outlet

The NewAir AI100SS Portable Ice Maker is a great product with a beautiful appearance. The stainless steel exterior matches the newer kitchen appliances and accessories of today’s modern kitchen. Each of the reviewers remarked over and over again how excited they were to have this product and how much money they were saving by not buying auxiliary ice for their party needs.

Many customers noted they disconnected their big refrigerator ice maker because this ice tastes fresher and uses less power. There have been no complaints about quality or performance, so the NewAir AI100SS Portable Ice Maker is highly recommended for purchase.

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4. NewAir AI-100 Ice Maker Review

The NewAir AI-100 is a terrific appliance and offers several convenience features that make it a desirable portable ice cube maker.

Overall Design Good, Function Even Better

The value of appearance is always a personal issue, but to my eye, the overall design of the AI-100 is good to great. The black plastic-topped stainless steel of the AI-100SS makes for an appliance you certainly won’t mind displaying.
Even more so, the AI-100R in red or the AI-100BK in black look good too. The silver colored AI-100S is more utilitarian than stylish, but it’s far from ugly. Whichever version you favor the unit is truly utilitarian. It does just what the manufacturer claims: makes a lot of ice quickly and easily.
Open it up, and you might detect a plastic odor. That’s a common issue with a lot of appliances. They outgas for a while after production and the design and packaging can prevent the vapor from escaping. But that’s easy to resolve just by letting it air out for a while. If you’re in a hurry, just run a vinegar-water mixture through the unit a couple of times and then a pure-water rinse. Be sure to discard any ice cubes made during these cycles!
After that break-in period, you can start making a lot of ice in short order. The freezing cycle requires only 10-15 minutes to produce a batch of nine cubes depending on size, initial water temperature, and other factors. After that, it can pump out more, hour after hour all day long, making up to 28 lbs per day. That’s a little less than the AI-200‘s 35 lbs, owing to a slightly smaller size: 12″ x 14″ x 15″.
The AI-100 is much lighter than its bigger sibling – a mere 31 lbs versus the AI-200′s robust 46 lbs. But even the lighter AI-100 is still heavy enough to minimize the odds of accidental tipping over, always a concern in a campground where dogs and kids are frequently running around.
The compact AI-100 is a quiet-running machine. You’ll barely hear the fan, and it’s well sealed so ice dropping into the bin makes little noise. Those are welcome features for a unit that might well be used in an RV where you’re trying to watch TV.

Convenience Features

The front panel is, as the overall design, functional looking and looks don’t deceive in this case. You can use it to select from any of three cube sizes: small, medium, or large – all of which are the now-pretty-standard bullet shape. Selection requires nothing more than a light tap on the button in front, and light shows you which size you chose.
The different sizes are useful for creating ice for, say, cocktails versus ice tea. It also means you can select the small size for quicker results, a welcome feature on a hot day when you have impatient, sweltering guests. The front panel also houses very prominent and easy-to-read “Add Water” and “Full Ice Basket” indicators.
I do like that the company included an ice scoop, a small but telling touch that other brands decided to forego. I also like that the bin on the AI-100 is removable. On the other hand, it doesn’t offer a self-cleaning function, nor a timer as the AI-210 does. However, since the AI-210 costs several dozen dollars more, it’s almost an exercise in comparing apples to caviar here.

Maintenance, Very Little

The AI-100 will require only modest maintenance. There’s no self-cleaning feature so you might want to wipe out the interior from time to time with a soft cloth soaked in a water-vinegar solution. The convenient drain plug on the bottom helps ease the effort here, too.
Turning it off and emptying it from time to time, letting it air out overnight, will help minimize even that requirement. Mildew is the chief villain in units like this where a constantly wet environment aids its growth. Of course, when it’s in operation the cold temperature prevents that, but the stuff can grow fast when it’s warm and if you keep the lid closed.

Summary

The AI-100 is a small, easy-to-use portable ice cube maker with some welcome features. The removable bin and indicators on the front panel are particularly appreciated. It makes a lot of ice quickly and even re-uses melted water to make more.

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5. EdgeStar Countertop Portable Ice Maker Reviews

The EdgeStar countertop ice maker is portable and compact and is a good option for the need of extra ice, anytime. The EdgeStar Countertop Portable Ice Maker can produce up to 28 pounds of ice per day, so it is ideal for those situations where the demand is high. Once out of the box, customers can have their first glass of ice within 6 short minutes. This portable ice maker is a workhorse for the cost and is a great value. The EdgeStaqr portable ice maker is efficient and a compliment to any kitchen with its silver titanium finish. This unit fits right on the countertop offers soft-touch controls and the option for three different sizes of ice cubes. For added convenience, any unused ice cycles back through the machine to be made into fresh ice, so draining is not necessary.

We found the best price for this product on Amazon.com, and this includes free delivery, click here to check it out. The EdgeStar ice maker is a great tool for use during parties, outside barbecue’s while camping or use in a camper, home bars, or any other function where drinks are involved. This is a great product for those families that go through a lot of ice, and their refrigerator can’t keep up with the demand, or the added cost of bagged ice becomes overwhelming.

EdgeStar Countertop Portable Ice Maker Features

• Produces ice in as little as 6 minutes
• No drain required
• Makes up to 28 pounds of ice per day
• 3 different ice cube sizes
• Stainless steel compact appliance
• Soft-touch controls

EdgeStar IP210TI Countertop Pros and Cons

The ice maker is a stylish one with a titanium finish. It has a capacity of producing a substantial amount of ice cubes, quickly. The machine is highly portable; you can place it on a counter or go with it for trips. The machine is compact and can withstand major mechanical problems for up to 3 years. Although the ice tends melting if left in the basket, the water can be recycled to give fresh ice- cubes.

You simply need to pour water into the reservoir and plug in the machine, and within 6 minutes, you will be able to gather the first batch. The machine can be used in the office, bar or kitchen. Any ice that is not used up can be recycled into flesh ice cubes. Also, the machine can powerfully produce 28- pounds of ice in 24 hours. It is therefore ideal for high-demand applications. Furthermore, users can obtain three options of ice sizes.

The ice maker is however rather noisy, louder than that of a fridge- it is therefore not ideal for use in an area expected to be relatively quiet. Furthermore, the machine in considered by some user to be too large and unattractive. Others argue that it makes ice cubes that stick together, making it a hassle as you seek to separate the cubes.

EdgeStar Countertop Portable Ice Maker Review Summary

There seems to be much to appreciate about this particular ice maker, however. Many customers felt that the EdgeStar operated exactly as expected and thought that it was consistent and pleasing to own.

Users felt that the EdgeStar Countertop Portable Ice Maker was a great addition to a party or get-together and was a great option to buying bags of ice, although they were not sure it would replace a full-time ice-making option.

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6. Koldfront Portable Countertop Ice Maker Reviews

The portable ice maker from Koldfront, is sized perfectly to fit on the kitchen countertop and the white color goes with any kitchen motif. This ice maker is perfect for indoor or outdoor parties, camping outside or in cabins, use on RV’s or boats, or even to take outside to the patio for cold and refreshing drinks throughout the day. It is a great investment for every kitchen. The Koldfront ice maker can produce the first glass of ice within 10 minutes and then a cup and a half every hour. The insulated ice bin located inside the unit can hold up to 2 pounds of ice before the indicator light comes on. This ice maker can make up to 28 pounds of ice per day without any problem. Users even have a choice of three different ice cube sizes.

We found Amazon.com to have the best price on the Koldfront Portable Countertop Ice Maker product, and that also includes free delivery, which is always a bonus, you can check it out by clicking here.
Indicator lights are signaling when water is needed and when the filled internal ice bucket is full. Then, the automatic shut-off will activate until the bucket is emptied. There is not draining required, as if the ice is left in the unit too long, it will melt into the reservoir, and fresh ice will be made again.
Because of this, the ice isn’t kept frozen for any period. The reservoir can hold up to a gallon of water, so there won’t be any constant refilling necessary.
The Koldfront portable ice maker can fit perfectly on any countertop or be easily moved to any location where a 110V outlet is available.

Koldfront Portable Countertop Ice Maker Features

• Produces Ice in Under 10 Minutes; Electronic Controls
• Sized Perfectly for use on Countertops; No Drain Required
• Makes up to 28 Pounds of Ice Per Day; Ice Bin Stores 2 Pounds
• 3 Different Ice Cube Sizes; Lightweight and Easy to Transport
• Excellent for RVs, Cabins, and Boats
• 90 Days Labor & One Year Parts Warranty

Koldfront Portable Countertop Ice Maker Review Summary

Overall, it seems as though most customers are not happy with the quality of the product, but those that received the Koldfront Portable Countertop Ice Maker product without any issues have a good experience.

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7. Edgestar Portable Ice Maker Review

The EdgeStar Portable Ice Maker is one of the first models we found when starting our research and going through all the different reviews. When it comes to portable ice makers, most people look for the same couple of key things: speed, ease of use and flexibility.

Edgestar promise to deliver all of the above with the Edgestar Portable Ice Maker and therefore we were really looking forward to reviewing this product and see whether it lives up to the Edgestar promise. Before we move on to the actual reviews people had on for the Edgestar Portable Ice Maker, let’s take a closer look at some of its features and specifications.

The lowest price we could find for the Edgestar Portable Ice Maker was on Amazon. Click Here to check it out.

Edgestar Portable Ice Maker Features and Specifications

• It can produce ice in as little as 6 minutes. This is a pretty neat feature and is great for anyone who appreciates the speed and getting things done efficiently. The ice cubes come out perfectly and will have just the right temperature.
• It has an inbuilt “water recycling” system. This simply means that you won’t need any water lines or drains for the leftover water. Any extra water will simply get recycled back into the system for a new batch of ice cubes.
• The Edgestar Portable Ice Maker comes with a compact design and is perfect for kitchens, bars, offices, cottages, RV’s, boats, etc., and the stylish titanium finish ensures that it will complement most rooms.
• You can choose between 3 different ice cube sizes depending on your specific needs, and you will not have a problem with volume as the Edgestar Portable Ice Maker can produce up to 28 pounds of ice per day.
• The soft touch controls are a great addition to this product and make the decision process very easy.

We really can’t say anything negative about the Edgestar Portable Ice Maker, other than the fact that it doesn’t have a lot of reviews online. If you are looking for a top of the line portable ice maker however, you might want to check out other models with more reviews before making your final purchase.

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8. Sunpentown IM-101S Portable Ice Maker

Sunpentown has been known for high-quality portable ice makers for a very long time, and the Sunpentown IM-101S Portable Ice Maker with LCD is no exception. When doing our research in our quest for the best portable ice makers on the market, the Sunpentown brand kept coming up, and we had no other choice but to review this specific model.

The first thing you notice about the Sunpentown IM-101S Portable Ice Maker is the very stylish stainless steel finish, making this product compatible with most rooms/décor styles.

The lowest price we could find for the Sunpentown IM-101S Portable Ice Maker was on Amazon. Click Here to check it out.

Sunpentown IM-101S Portable Ice Maker with LCD Features and Specifications

• The beautiful stainless steel finish means that this product is suitable for most homes.
• The Sunpentown IM-101S Portable Ice Maker allows you to produce up to 35 pounds of ice each day and has 12 ice cubes within 8-10 minutes. You have the option of choosing between three different ice cube sizes, giving you the flexibility to always meet your needs.
• The highly efficient CFC-free compressor is powerful and has a very low energy use. This makes this portable ice maker ideal for boats, RV’s, outside gatherings, etc.
• 1.2-gallon water reservoir.

You just have to remember to clean it properly the first time you use it, and you will be very happy with your purchase. All in all, we can recommend the Sunpentown IM-101S Portable Ice Maker.

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9. Sunpentown IM-100 Review – Best For Making Ice Cubes Fast

Sunpentown IM-100 Portable Ice maker is a good product you can use to produce thick and solid ice cubes. It is especially good for ice making during the hot seasons when there will need to drink more water than rest of the year.

Manufactured by Sunpentown, this is classified to be a compact, simple to operate a machine which will need no installation. It requires just simple setup and then it starts producing ice. It is capable of making about three distinctive ice cube sizes. It is good for bars, recreation centers, boats, restaurants, etc. It produces ice cubes in batches of 12 within 10 minutes! Sounds incredible, but it is true.

Features

• Capacity to generate 35 pounds of ice cubes in 24 hours
• Turn out the first batch of 12 ice cubes in 10 minutes
• Produces three distinctive ice cube sizes
• Water tank of 1.2 Gallon
• CFC free compressor
• Soft button settings
• Warranty of 1 year

Who is it best for?

The Sunpentown IM-100 ice maker is designed for home use, bar, small size restaurants, etc. The ice maker is easy to use and very efficient too. It, first of all, requires users to put water in the tank. The water can be from the tap, mineral water or any other clean source. The plug can be fixed to an outlet. Then, it is time to choose the size of the cube to use. It comes in three distinctive sizes, select the one that is appropriate and press down the start button. That is all. The first ice cube will be out in 10 minutes. It is a batch of 12 cubes of ice that can be used to serve champagne or any other type of drinks.

Sunpentown IM-100 Pros and Cons

The ice trays are detachable, and it is simple to clean out the unit. The ice unit should be cleaned out on a regular basis to make sure that the taste of ice produced is very fresh. It is even advisable to first of all use lemon juice to rinse it first and then remove the first batch of ice to prevent changes in ice cube tastes. The Ice maker is a good ice maker that can produce 12 cubes of ice within 10 minutes, 2 pounds in an hour and 35 pounds in one day. It is durable and easy to use.

However, some users have complained about the product. Some said that the manual does not contain all the instructions that were supposed to be written in it. Also, the customer service is very poor. Whenever a complaint is made to the customer service representative, its either they respond and could not solve the problem or they abandon the user.

Why you should buy it

It comes in handy for family use. It can be placed on the counter to provide ice for every member of the family. It can also produce ice for outing use like parks, recreational centers, etc. It can also produce around ice cubes of 2 pounds within one hour and 35 pounds in a day. It is easy to carry about.

Sunpentown IM-100 – Final Verdict

Despite the negative comment above, Sunpentown Portable Ice maker is still a good ice maker for everyone who is tired of purchasing ice bags from local stores.

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Which Portable Ice Maker Should You Purchase?

For picnics worthy of a Michelin star, your cocktails will need to be as crisp and chilled as those served by the professional mix master at the trendy haunt down the street. Only portable ice makers can guarantee you a frosted glass at the beach. If you consider yourself an amateur mixologist, you need to establish the product that will serve your bartending needs best.

#1. What is your favorite drink?

No single model ticks all the boxes as the ‘best portable ice maker,’ but it is possible to find the product that matches your personal mixing needs flawlessly. You only have to ask the right questions.

a) Connoisseurs: If you take your mixology skills seriously, your ice crunching needs will be extensive. You will be aware that every drink has its unique chilling demands. You wouldn’t dream of putting a cube in your Chardonnay, and your mojitos are served with crushed ice, never cubes. Aficionados need ice makers that provide three different sizes. With distilled water and metal trays, you can produce trendy clear cubes. Bullet ice capacity gives you the closest portable alternative to nuggets.

b) Families: If your bartending needs extend to non-alcoholic beverages and satisfying youthful sugar cravings, an ice shaver lets you create snow cones and-and mocktails suited to younger family members, while simultaneously giving you an easy way to chill your drink. Specialist models come with syrups and pour spouts.

c) Professionals: If you’re mixing talent is so profound that people pay you to exercise it, safety and bulk will be your chief concerns. Stainless steel is the most hygienic material for catering grade equipment, and self-cleaning cycles are a necessity. The dispensing mechanism should keep ice away from skin exposure. High volume production delivers 30 pounds of ice within 30 minutes. Your repetitive work demands that your machine is ergonomically designed for lightning speed mixing that is unlikely to lead to repetitive strain injuries.

#2. How large is your crowd?

Traditional portable ice machines produce 26 pounds daily in 30-minute cycles. Heavy drinkers and university students need 35 pounds of daily capacity, with a six-minute production cycle. An ice machine supplies adequate on-hand supply for rowdier parties with a storage capacity of four pounds.

#3. How large is your conscience?

Energy Star rated portable ice machines shrink your carbon footprint while keeping your thirst at bay. Government ranked products are subject to money-saving rebates on the purchase. Energy efficiency will also reduce your utility bills without presenting diminished functionality.

#4. How hands-on are you?

Nifty features allow your ice maker to operate without your help. Programmable timers put your portable ice machines into full, independent operation. Full ice basket indicators further diminish the energy you need to spend on your cube-making. Some models don’t even need you to think about drainage. The most independent portable ice makers automatically recycle water into the chilling zone. Automatic shut-off lets you host your party without concerning yourself with electricity wastage.

#5. How noise-sensitive are you?

The innovative products that have been introduced to the market most recently operate silently. The hubbub-producing features to avoid if you want a quiet product are a loud fan and a poorly sealed bin that does not dampen the sound of ice dropping into the basket.

Final Considerations

The look and compactness of your portable product will influence its weight and its value as a part of décor. Stainless steel and platinum designs offer peak durability and functional aesthetics. Portable ice maker reviews reveal a range of designs to suit every home.

CONCLUSION

When entertaining guests and you need perfect drinks. To have perfect drinks, you need the best portable ice maker which can be the ultimate tool that you may need for all sorts of small parties. However, choosing the right appliance may not be the easiest task as there are lots of claiming to be the best ice maker. All the above come highly recommended on the market, each with its own identity, perks, and downsides. One thing that they all guarantee, however, is satisfaction; you will never have to go galloping to the neighborhood store in search of ice bags ever again, your business, vacation trips, and entertaining of friends forever changed for the better, never to be the same again.

We hope that this guide was comprehensive enough to help you choose the best device that would be perfect for your needs.

Common Ice Maker Problems Users need to be Aware of

Are you someone who is fond of cold drinks? Or maybe you own an eatery? Either way, you must have an ice maker in your kitchen, be it a standalone ice machine or the one that comes together with your refrigerator.

Every day, you produce causing the ice maker to refresh thirsty throats or help preserve cooking ingredients like meat in the freezer.

Despite its useful function, ice machines also have certain problems around its usage and maintenance. In this article, we are going to see the common problems that happen with ice machines and why they happen.

Taking too much Time

It would be annoying if you expect to have an amount of ice cubes after some time but finding almost nothing or only a few of them and worse, the machine stops working because the evaporator got a freeze. The cause of this problem can be a limited water intake due to the water filter getting blocked by something. Another aspect that can cause this issue is the temperature of the machine itself. If during the production the machine the outer part of the machine feels hot, it will extend the ice-making process. This can happen if the defrost gas leaked.

The Machine is on without Result

Everyone would agree that this problem is more annoying than the previous one if it happens. What may cause this thing to occur is a piling up dirt in the float switch or the level sensor. In case you clean either one or both parts mentioned, you need to check the water intake flow because it should stop when the machine has started working since some machines do not stop a while after that. To solve this, you need to clean the fill solenoid valve from the dirt that piled up inside of it.

The Ice does not drop from the Evaporator

In another case, the problem is not that the machine does not produce, but the ice is stuck on the evaporator after being processed. The key to this issue is simpler than the previous ones since the cause is the evaporator itself. Not all ice makers have a stainless evaporator and this can cause the ice to not drop smoothly or even stuck on it. When this problem happens, check the plating of the evaporator. If the evaporator’s plating is already gone, you need to replace it.

Dead Compressor

Sometimes ice makers do not work because of a problem with their compressor. Commonly, if you hear an unusual humming sound from inside the machine, there is something wrong with the compressor. This issue deals with the electricity that goes to the compressor. Depending on its condition, the compressor might need to be replaced. In some cases, there is an abnormal humming sound from the machine, but the compressor is completely fine. This is caused by the contractor, the electricity at the coil, or loose wire, which leads to failure in control relay.