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Furthermore, do all refrigerators have freon?
Modern refrigerators usually use a refrigerant called HFC-134a (1,1,1,2-Tetrafluoroethane), which does not deplete the ozone layer, instead of Freon. Newer refrigerants are being used instead. The main refrigerant now used is R-600a, or isobutane which has a smaller effect on the atmosphere if released.
Simply so, how much does it cost to put Freon in a refrigerator?
The average time to evacuate, inspect and refill a refrigerator freon system is about 20 minutes and the cost in parts would be about $20 but expect to pay a good amount of money for the service call.
Clogged coils can cause poor cooling. Check to make sure nothing is stuck in the condenser fan and that it spins freely (models with coils on the back won't have a fan). To do this, unplug the fridge and pull it out. Plug in the fridge and make sure the fan runs when the compressor is running.