I'm dealing with a GE GTWN4250D1WS washing machine exhibiting the weirdest malfunction. I was asked to figure out why it only filled with cold water. Simple enough - check flow from water supply. Check fill valve operation. Check voltage sent to the valves. I did all of that, and no voltage was being sent to the hot fill valve. Purely by accident, I discovered that opening the lid while in fill mode while set to warm resulted in the washer shutting off the cold supply and turning on the hot supply, then when closing the lid back, it would switch back to cold fill.

I proved this by disconnecting the hot valve electrical connector and opening the lid while in fill mode - water stopped flowing any time the lid was open and the hot valve was disconnected. Then I replaced the hot electrical connector and disconnected the cold side. No water flow in fill mode with the lid closed, but opening the lid caused the hot side to fill.

Upon inspecting the fill valves when I first started troubleshooting, I had noticed the usual brownish rust stains were present in the cold valve only. The hot side was clean as a brand new valve. This makes me wonder if it has had this fault since new.

The only thing that makes sense to me is that it is a control board issue. But how could this possibly be? Maybe the relay soldered to the board is the wrong part somehow with backwards logic on the hot valve relay? I've a good mind to desolder both relays and swap them to see if the problem follows. But that is a lot of work when I could simply replace the board.

I wanted to ask you guys first in case there is something outside of the control board that might could cause this issue that I could fix instead of having the owner spend 1/3 the cost of a new washer on a control board. I don't see how, but you guys are the pros, so I thought I'd ask first before diving in to desoldering or ordering a new control board.

Hey - did you ever find the solution? Mine is doing the EXACT same thing.... down to the letter. I was wondering about the temp sensor possibly being bad and may try disconnecting it - but, you you found a solution, I'd like to know........ THNKS