In the Florida summer heat, the Norcold fridge struggles to keep cold. I installed a computer muffin fan just beneath the coils in the back of the fridge to help air circulation. The fan is low-voltage, so any 12 volt power back there will run the fan. I put an in-line switch and fuse to manually turn the fan off/on when needed. The fan uses very little 12 volt power. Just be very careful when seeking 12 volt power. There is 120 A.C. back there., as well. I also installed a fan/light unit inside the fridge compartment which circulates the cooled air inside the fridge compartment.
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