Why My Refrigerator Is Not Cooling And How to Fix It?

By Arindam Roy

Did you know that the average refrigerator consumes between 5-6 kWh per day? That’s a lot of energy. In fact, it can cost up to $600 per year to run your fridge.

When we start to feel the heat from our fridges, it’s usually because the thermistor is not working properly. If your fridge is running at lower temperatures than what is required for food storage, then there might be a problem with the thermistor inside and you need to replace them.

Below will be the steps to troubleshoot your refrigerators thermistors and see if your refrigerator is cooling too slowly.

You will need:


    • STEP 1. Unplug the refrigerator from the power source. Next, slide open the door to expose the back wall of the refrigerator cavity. Gently pull on and loosen this side latch to expose all components inside of the fridge. Next, lift up on (or remove) all knobs and pull off all shelves until you see (or can access) these components on the other side of the wall: Thermistor, Thermostat, Distortion Capacitor, Control Board and Motor Fan.
    • STEP 2. Check all eight thermistors in the refrigerator to see if they are working properly. The thermistors heat up with the air temperature in your house, so it does not matter which side of the fridge is facing up or down. The thermistor’s job is to monitor your refrigerator’s temperature and relay the information to the control board. If any thermistor is not working properly, then you will need to replace them as you saw in STEP 1.


  • STEP 3.Replace all eight Thermistors with new ones (see below). For this tutorial, we will be testing out three thermistors that are located on the backside of the Refrigerator (not visible from front. See below photos for testing to do). Use a test light to check the resistance from thermistor wires. If all thermistors are working properly, the maximum resistance reading should be about 2.5K ohms. Anything over 5K ohms is not good and should be replaced ASAP (if possible).
  • STEP 4. Take out all fridge components and put them on an open table/desk so that we can access all parts of the Refrigerator’s Control Board (CDB). Check the thermistors on both sides of the CDB. Sometimes, it could be a bad thermistor or maybe a bad Control Board. Replace/fix all components that were not working properly.
  • STEP 5. Make sure the fan motor works by manually turning the fan blade and make sure it is not jammed. If so, use a screwdriver to free up any jammed grooves inside of the motor mechanism. It’s always better to have the fan working properly because it’s hard to tell how much power is being used from your refrigerator with it not running at full blast!
  • STEP 6. Unplug your refrigerator from your main power source and set your Refrigerator to its coldest setting (usually on rear wall). Wait about 30 minutes and then turn your control back to its normal operating temperature (usually on front wall). Measure the temperature of the refrigerator with a multi meter. It is recommended to use a digital type meter for accurate results. If your refrigerator is not cooling properly, then replace the thermostat.
  • STEP 7. Test the Distortion Capacitor (DC). Using a volt meter, measure from one side of capacitor to another with no load applied (no AC plug connected). If there is power reaching capacitor, you might need to replace it. If there is no power reaching capacitor, then it’s probably bad and should be replaced ASAP.
  • STEP 8. If all components are still running properly, then make sure you have correctly installed the Control Board and Refrigerator’s thermostat. You can test these components by placing your multimeter on the wires that connect these components. If it is reading 3 volts or above, your refrigerator is working properly and should be cooled down to its normal operating temperature.


*** Don’t forget to close the door of your refrigerator after testing ***

Also read: How To Organize Refrigerator: Tips

What to do when refrigerator not cool

You could be faced with a fridge that is not cooling properly, which can be either inconvenient or disastrous.

There are a lot of things that can cause the food in your refrigerator or freezer to spoil quickly. Worries about safety aside, you don’t have very many options if your ice cream starts melting into soup before dinner time. If you’re trying to save some money on your electricity bill, you may want to think about making a few changes in the way you’re using your appliances. The following tips can help you get through these trying times.

Read here: How To Maintain A Refrigerator: What Can Damage A Refrigerator?

Determine the Problem

If your refrigerator isn’t cooling effectively, check the temperature settings first. If there’s any problem with keeping things at a cool temperature, you will notice that items are not staying cold as long as they normally would.

Check the temperature setting on top of your fridge and see if it’s correct or if it has been bumped up because it felt too cold inside. Make sure there aren’t any leaks on the seams of your refrigerator or freezer. If it is a new fridge, it might just need to be broken in by running it on empty for a few hours.

Ice cube trays can be used to make ice for the freezer if you are out of ice or if you want to freeze some beverage containers without using up any space in your freezer. Fill up some smaller plastic containers and freeze them, then place them in the larger freezing unit. This will help save room and won’t cause too much extra work when you are searching for your frozen veggies later on.

Learn About Energy Conservation

If you are spending a lot of money on your energy bill, you might be interested in learning about energy conservation.

You will want to make sure that you aren’t wasting energy by leaving lights or fans on when they aren’t needed. You might be surprised to find that not turning the oven on for one hour will save more money than the cost of an expensive light bulb. Save some money and check out the following tips for some new ideas about saving money.

You may also like: Common Refrigerator Problems And Solutions: Tips

Inspect Your Appliances Carefully

Sometimes, it’s not equipment failure that is causing your refrigerator and freezer to lose their coldness. Sometimes, it’s just a matter of cleaning. Before you run to the store for new parts, consider that maybe your appliance just needs to be cleaned. Make sure that no one has left any spilled drinks near the back of your fridge or inside the freezer. Also check out the coils in your refrigerator and make sure they are clean.

Check Your Food for Spoilage

If your food has spoiled, you might have bigger problems than a faulty fridge or freezer. Make sure that your food is not spoiled by checking the expiration dates. If you are unsure if your food is good, cook it up and put it in an ice-water bath before you toss it.

Foods that spoil include cheese, milk, butter, eggs, meat and leftovers. Don’t forget to check your condiments! Look inside the caps of your spices and make sure that everything is still good. You might also want to have a quick sniff test for some foods to see if you can detect any spoilage with your sense of smell.

Read more: Why Does Refrigerator Ice Tastes Bad: Explained

Consider Using Your Microwave

If you need some hot food in a hurry and you don’t have any electricity, consider using your microwave for a quick fix. It’s usually better to warm up food in the microwave rather than on the stove top because it doesn’t take up room on the stove top or require electricity that may not be available at the current time. If you want to stick to your diet, this can be a good solution that doesn’t add extra fat and calories!

Put Some Ice In Your Fridge

Even though ice isn’t that appetizing, it can still help lower the temperature in your fridge. This works especially well for older refrigerators where the temperature is controlled by a dial rather than an electronic switch. Just make sure that you put it in some kind of container so it doesn’t make everything else in your fridge wet. For a smaller refrigerator or freezer, consider putting some ice cubes on top of the coils. You’ll notice a difference right away.

Consider Using a Freezer Compartment

If your freezer isn’t working properly, it’s best to use the freezer compartment as a cooler for taking out food rather than letting it stay there. Try putting ice cubes in the bottom of the compartment so that when you open the door, everything will be immediately chilled. This way, you can take out what you need without using up all of your ice cubes!

Check Out the Fridge’s History

In case your refrigerator has been in an accident and doesn’t work correctly, check in on how old it is. New refrigerators work well only after they have had some time to be adjusted and worked well with their new owners. If you have had your refrigerator for more than a year, it might be time for an upgrade. You could have a defective thermostat or some other issue that may not even be noticeable.

If you want your refrigerator and freezer to keep the temperature well, it’s important that you follow these tips. Consider hiring an electrician to check out the wiring and make sure everything is functioning properly. If you still have issues a few months later, consider hiring an appliance repair service to take a look at your malfunctioning appliance.



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Best Refrigerator Under Rs 30000 in India 2021
Best Whirlpool Refrigerator in India 2021: For All Budget

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