Harwell for Model Number SHP65T56UC/07 Bosch dishwasher gets error code E20 within seconds after starting. Turning off power for 15 minutes and retrying gives the same result. No debris in sump area around filter. Bosch web site says "fault with circulation pump" and advises that I contact a service person, so that's no help. Does the E20 code always require replacing the circulation pump? And if so, what part number should I get? Your diagrams for this dishwasher show a heat pump and a motor but nothing specifically identified as a "circulation pump." Thanks.
Answer Harwell, first check the water level at the bottom of the tub, start the dishwasher let it fill and run a minute or so. unlatch the door, remove the lower rack and measure the water depth. It should be at least 3/4" deep at the center of the tub, or "water level upper edge of mesh filter". If the water level is OK, then check or replace the 12008381 / 12008381 Heat Pump. "E:20 Faulty heat pump motor winding. Check wire continuity between the heat pump and the power module. Measure heat pump resistance between any 2 terminals. If ˜ 15.2 O @ room temp, replace the power module. If not, replace the heat pump." The heat pump and circulation motor are a single, combined assembly and replaced as a unit. Read More... Answered by AppliancePartsPros.com | Tuesday, April 21, 2020