If the coils are coated in dust and dirt, the refrigerant may not cool properly, and the refrigerator's temperature warms. This will prompt the compressor to run constantly as it tries to cool the interior. Fortunately, cleaning the coils is a simple process that can be repeated annually to maintain their function.
How often should a fridge start and stop? All fridges are 'on' most of the time. And by that I mean — it is typical for a refrigerator compressor to run anywhere between 4 and 8 hours before turning 'off'. Newer models run even more frequently — about 80% of the time.
However, the compressor and fan motors should only have to run occasionally throughout the day to maintain that cool temperature. If the compressor and fan motors are continuously running, it means the system is having trouble maintaining the temperature.
CHECK THE CONDENSER FAN. Certain types of refrigerators use condenser fans to force air through the condenser coils and create that all-important cooling effect. If that fan malfunctions, it's more than likely that the compressor will eventually overheat. That's when you'll hear it clicking off and clicking on again.
It May Be a Thermostat Issue
To check, the next time your refrigerator shuts off, turn the thermostat knob all the way off and then turn it back on. If it starts running, then it is likely the thermostat that needs to be replaced.
Cleaning everything thoroughly can fix the problem. First, make sure the refrigerator is unplugged. Then, use a narrow vacuum attachment and brush to clean the condenser coils and fan. Hot soapy water and an optional mix of water and bleach can be used to clean the interior of the refrigerator as well.
If your refrigerator unit is not cooling the insides like it regularly does, and the fan on the back of the inside wall is either not running or not blowing cool air like normal, it might be time to replace the evaporator fan.
Shutting off the power to the refrigerator will give all of its systems—including the compressor—time to reset. Power down your refrigerator by unplugging it from the wall or shutting off the circuit breaker connected to the fridge. Leave the unit unplugged for five to ten minutes.
So, how often should a fridge/freezer cycle on and off? On average, most refrigerators run for about 45 minutes to an hour before taking a break. This means the compressor is actively cooling your food for around 80–90% of the day.
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Discard refrigerated perishable food such as meat, poultry, fish, eggs, and leftovers after 4 hours without power. After a power outage never taste food to determine its safety.
Reset your refrigerator: First, unplug it (or turn off the power at the circuit breaker), and then wait about five minutes for the electrical charge to clear out of it. Then, power it back on again.
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Your refrigerator compressor is responsible for that humming sound. So, if the sound stops for good, or if the sound goes from faint to a constant or very loud humming noise that does not shut off, it may be a sign the compressor is broken or malfunctioning.
How do I reset my refrigerator compressor? If you switch the power off and wait a couple of minutes, it should set itself. There is sometimes a red overload button on or near the compressor, this will very occasionally trip, switch off, wait about 5 minutes then firmly press the button,...
When a refrigerator runs normally, you'll hear the compressor click on several times a day. If it seems to click on every few minutes or doesn't shut off at all, it's time to troubleshoot a few areas to avoid overheating internal components.
If your refrigerator doesn't stop running, it can lead to higher electricity bills and reduce the lifespan of your appliance by months or even years. Several potential causes could be making your fridge run continuously: dirty condenser coils, a faulty defrost heater, and problems with the defrost thermostat.
Refrigerator Fan Replacement
You can expect to pay between $120 and $150 for fan replacement.
If your refrigerator is cycling on and off incessantly, it is possible that the evaporator fan is not working properly. The evaporator fan circulates cold air from the freezer to your fridge. When it stops, warm air will enter and the fridge will work its compressor harder in order to maintain a constant temperature.
The condensor coils dissipate heat. If dust and debris accumulate around the coils, your refrigerator may not be able to cool properly, it may run continuously or it may stop completely as a result of an overheated compressor.