We have a Rheem 337A Low NOX Model pool heater. When it tries to start it shows a CFH (Call for heat) then shows a "SPR" (Spare Fault code indicator). I can't find what that means. I just wanted to check here before I order a replacement board. I had already fixed some cold solder joints in the past, so I was thinking of pulling the board and checking those again.
"SPR" Fault code - Heater not starting
- Thread starter drknapp
- Start date
Lizards and small rodents have been know to get on the front of the board, cause a short and trip that code. Usually they get between the board and the front panel. Sometimes removing them solves the issue, sometimes the board is "toast".
It indicates that this circuit is open.
It should have a jumper unless there is some sort of field installed limit like a flow switch.
See red arrow and check what is connected to that spot.
It should have a jumper unless there is some sort of field installed limit like a flow switch.
See red arrow and check what is connected to that spot.
Thanks for your help! Found another cold solder joint on one of the SPR pins on the board. Re-soldered and all is good now.
It seems odd that you are getting so many bad solder joints.
The SPR circuit does not even carry any current, so it should never fail.
Maybe there is an issue with exposure to heat or humidity?
Maybe a bad board or maybe some sort of animal infestation.
Mice are known to get into heaters and wreak havoc.
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We have just had a lot of trees removed from around our pool. They parked their chipper right next to the pool equipment. I'm betting the vibration from that thing running for several hours had a bit to do with it in retrospect.