Had a call a couple weeks ago for a S model Mani. I think S042A. Not making ice. Owner said when the machine messed up his water pump was bad so he installed a new water pump. When I put the machine in ICE position I noticed the CLEAN light stayed lit on the board continuously. they had a Q model, I think Q037A that was not working and not even connected. I pulled the board and put it in the S model. The machine cycled normally and it dropped a load of ice in 23 minutes which is normal. They called today and said it is not making ice and overflowing into the bin. I go out and try to run a load of ice. It went into harvest in about 10 minutes and dropped no ice. (of course) I checked the sensor for slime. It was clean but pretty close to evap. I adjusted the sensor and cycled the machine. I timed each cycle and it was right on the money. I dropped two loads of ice and got good ice both loads about 23 minutes. I told the owner to watch the machine and if it repeated the problem to note if it was actually filling.
They called back and said about 2 hours after I left it started acting goofy and the fill valve was opening and staying open. I am going back tomorrow. Any suggestions? since the fill valve is controlled ny the board I am wondering if the used board has a glitch. About 8 months ago I replaced the water inlet valve on this machine as it would not open. I have had lots of problems with that on the newer valve. I have NEVER had one stick open and then close when the machine is turned off. Any ideas?