Stephen B Omaha , NE October 04, 2014 Appliance: Whirlpool Electric Dryer GEW9250PW0 Whirlpool Dryer Gew9250pw0: E1 error code even after thermistor replaced. How to replace Control Board. Thermostats and wiring to control board tested okay, so I validated my assessment that control board was the likely problem with online expert. Was going to just get a new dryer since control board is $200, but decided to replace it since AppliancePartsPros allows return of electronic parts if it did not fix the issue. Ordered control board with regular shipping and it arrived the next day. Replacement was easy. Accessed board by removing 6 screws, disconnected wiring, removed board and then reversed steps. Less than 15 minutes and dryer is working great! Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes