Getting F20 error code. Unit been working fine for 4 years so hoses, siphoning, etc. all good. Cleaned out drain hose, pump, etc., checked flowmeter orientation, checked pressure switch hose, all good. In running diagnostic test, it stalls at C03. I'm suspecting a bad water valve for the hot side. During diagnostic test, it stalls at C03 and after 2-3 minutes the unit shuts down. Do you think its the water valve?
Answer Randy, Based on your information, Yes, you'll probably need the fill valve 8182862. Of course you want to remove the fill hoses and check and flush both the water lines/faucets. Then check and clean any sediment or debris from the fill hose screened washers and the inlet valve screens. Replace the valve if all's OK. The F20 code could also be produced by a faulty pressure switch circuit or clogged air tube, but you've covered that, and it does sound like a lack of hot water at the fill valve is the issue.
Washes fine until rinse cycle then flashes F20 checked hoses and screens they are fine.
Answer Hello Ed.
It sounds like the unit is siphoning out the water in the unit. Check and make sure there is only 6" of drain hose in the drain pipe. Also, make sure the drain pipe is 36" off the floor in height. You will need to check and make sure the drain hose has an air gap going into the drain pipe. If it is air tight, it will siphon.