James B Somerset , PA January 01, 2018 Appliance: Whirlpool Washer WTW8240YW0 Whirlpool Washer Wtw8240yw0: Control board some buttons would not work. How to replace Part Core Refund. Replaced interface control board, after replacement of the board the washer worked fine, One minor problem I had was the return of core of old board. No information was given me on return of the core for 60.00$ refund. I think Appliance Pros.com should have included in packing slip the procedures on returning the old core for a 60.00$ refund Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes