I've read several other threads (here and other forums) from folks who have trouble getting this unit to start after winterizing. I've gone through a handful of troubleshooting steps and tests found in those other threads, but I still can't get the heater to light. One question I'm trying to answer, is what is the expected millivolt reading I should be getting from the pilot generator? I've seen a few different numbers but i'm not sure if it's due to model differences etc. I found a couple pdf documents from the manufacturer for installation and operation and even one for troubleshooting but none of the ones i've found had what the millivolt reading should be.
Does anyone know the expected millivolt from the generator or can point me to the appropriate documentation that would help me out some more?
What I've done so far:
- Pilot initially had very small flame. Closed pilot control and let it sit, re-lit and pilot now has large flame and looks to be contacting generator.
- verified 350 mV coming from wires out of the generator
- verified continuity across pressure switch when pump is in operation
- identified heavy corrosion on fireman jumper that blocked continuity.
- bypassed the jumper block with wire-nut and confirmed continuity at far end of contacts
- verified resistance/continuity across temperature control potentiometer
- verified continuity across on/off control switch in the On position.
In several other threads i've found many people stated just having to leave it on for several hours before it would fire once, and then run normally afterwards. I have left the switch on and temp control set to max for about 2-days now. Pump is scheduled to run for 1 hour then off for 2 hours. From as far as I can tell, it has never lit, and I have been at the unit while the pump is running.
Any other thoughts or suggestions?