Have been reading and hopefully can get a few answers from you guys.
I have an in ground spa controlled by a hayward H250ED2. It is doing the customary light then go out 4 seconds later, then giving IF fault code. I have changed igniter, same issue. I have changed control board twice, same issue. The two control boards were used but looked in good shape. I removed manifold header and found stuck thermostat.
waiting for replacement, I removed to test without and again still have same issue. From my research done I don't see anything else that can cause this issue. Just wondering if anybody has some idea or answers to this. I was wondering if gas valve could cause.
It gets its 24 v when temp demand and loses 4 or 5 seconds later so do see issue but I'm grasping now.
All safeties are good and temporarily bypassed to check.
but if I understand correctly it would never attempt to light if any were bad anyway. Any suggestions would be greatly appreciated.