Jeff B Lithia , FL September 04, 2015 Appliance: LG Dryer DLE7177WM Lg Dryer Dle7177wm / Abweeus: Lg dryer would only heat on "normal" setting. How to replace Main Pcb Power Control Board Assembly. Sent question to Appliance Parts Pros website. They answered with what part was causing the problem and attached a link to the part. I ordered the PCM Board and installed it myself. Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes