OUR fRIDGE IS 4 YEARS OLD. THE FAN IS WORKING(THE ONE ON THE OUTSIDE OF THE CONDENSER). THE LIGHTS ARE ON BUT THE FRIDGE AND FREEZER ARE WARM AND IT DOES NOT APPEAR TO BE BLOWING ARE INSIDE THE FRIDGE OR FREEZER.
There are a few points need to be checked. 1) is the compressor still working? (any noise coming from it).2) if its working check if the evaporator is iced up, (a specific part of the internal lining is cold). 3) Check if the evaporator fan is working. (any noise when the door switch is pressed). If compressor is working, fan is running, and it;s iced up, most likely the timer is malfunctioned or defrost heater is not working. Easiest way is to switch the unit off for at least 8 hrs and switch it on again to try.
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IF YOUR FRIDGE FREEZER IS OLD SAY BY 10 OR MORE YEARS, IT COULD BE A FREON LEAK, CHECK THE BACK OF YOUR FRIDGE AND SEE IF THERE IS CONDENSATION ON THE COILS, IF THERE IS NOT CONDENSATION THEN YOU COOLING PUMP COULD BE BAD OR FREON LEAK.
Pull it from against the wall, to let it breath. The condenser is usually in the back of the frige...It can also be a problem with the compressor or it's simply loosing freon. Make sure doors shut with a seal too. Try adjusting both thermostats too.
It sounds like your evaporator fan motor, they last about 4-5 years. Try to see if the buzzing noise comes from the motor, usually in the freezer compartment behind a vented cover plate
The freezer is usually cooled by the compressor, the fridge is then cooled by an evaporator fan motor ($30). If this fan seizes or slows down then the fridge warms up (it sometimes starts squealing before this happens). It could be that your drain hose is clogged or frozen. Maybe the temperature adjuster go bumped.
If you think it is the evaporator fan motor:
Check to be sure you can get a replacement fan first, they last about 4 - 5 years. Can get from a parts supplier or electric motor company.
UNPLUG fridge. Located usually in top of freezer behind a vented cover plate. Remove cover, remove screws holding fan in, may have to cut wires. Replace with new motor, make sure the fan pushes air into the freezer area and doesn't spin backward drawing air from the freezer area.
If the defrost heating element, defrost timer or evaporater fan weren't working, you'd develop a block of ice on the evaporator. Is the compressor running? If it is, it might have bad valves from the frost buildup scenario. Liquid refrigerant could have gotten to the suction valves. The sealed system should have a five year warranty. Might be time to call a pro
just about all friges work off the frezer .the evap fan moves the air fromthe frezer to the frig.so you would here fan noise.i dont know your brand but on most frezers if you turn the frezer temp to the highest setting thats acomplished by keeping the air from going to the frige.hence warmer frig temps .also make sure fan on out side back is working and condenser is clean.again turn air damper control from frezer to frige to lowest setting .somthimes this could be in frig section.God bless ,tom