Refrigerator noise comes from either the compressor under the fridge, the condenser fan motor under the fridge, or the evaporator fan motor inside the freezer. Open the freezer door while the fridge is running. If the noise doesn’t get louder when you open the freezer, pull out the fridge. Most refrigerators have a condenser fan motor. Unscrew the back cover and listen—you’ll be able to tell whether the noise is coming from the fan or the compressor. The best cure for a loud compressor is usually a new fridge. To replace the fan motor, remove its mounting screws, unplug it and install the new one. Get all the repair tips on a rowdy refrigerator.