Tom M Raleigh , NC August 13, 2016 Appliance: Whirlpool Electric Dryer WED8300SW2 Whirlpool Dryer Wed8300sw2: The dryer wouldn't heat and diagnostics showed an f 02 error code. How to replace Electronic Control Board. I checked the heating element, thermal cutoff, and thermostat. All were OK. I tried replacing the thermistor but that was not the problem. Appliance Parts Pros advised that I needed to replace the main control board, which I did. It took less than 30 minutes and solved the problem. Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes