Hi, I have a whirlpool side by side ff S20BRBB20-A/G which is 5 years old. Last year the fridge started to get warm, although the freezer worked fine, the bottom vent in the fridge was ice bound. I tried a 24 hour defrost, but nothing helped. Ended up paying for a new control pcb unit which solved the problem. Alas, I have the same problem again. I have an internal fridge thermometer registering 15 degrees although the led on the door says 5. The vent at the bottom is covered in ice again. Have tried a defrost, but is exactly the same again. No other problems. Is this the control pcb again, or could it be the thermostat? Any advice much appreciated thanks.
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