Recent content by NickPSI

ITS FIXED!!!!!! Final conclusion: Got my third Fenwal in the mail and wired it in, still no ignitor. Read and read and read on furnace HSI modules and how they work, find that polarity can be a problem. At this point I figure something must be wrong in my power distribution board re-wire...

I built my own leads and ran them to rule this out and same result

Yes I did. This is the pressure switch voltage Gas valve opening Ignitor terminals voltage These are still uploading so they aren't the best quality right now.

When I get home from work today Ill get some pics. You can smell gas from the exhaust after the purge cycle and ignitor warm up cycle. I think my replacement Fenwal is bad because it *thinks* it is powering up the ignitor but it isn't.

Yes

That explains it then, it's 0 across the terminals.

But not 120 across both leads right, 120 to ground on ign/120 and 120 to ground on ign/fs?

@ajw22 @1poolman1 i got the new style igniter, installed it today, ran it, and still no heat. All other operations go through the motions. What should there be for voltage between the two igniter leads off the fenwal? Both leads test 120v to ground. This new style igniter ohmd out at 60...

It wouldn't be the air pressure switch because the gas valve is opening. Put your positive from your meter onto either of the ignitor leads from the fenwal and stick the other probe to ground. Check both leads (still with the negative prove from the meter to ground) , they should both be at...

I did not know the design was updated. I ordered the new version so hopefully this finishes everything up. It should. I opened up my old fenwal and the circuit trace from the relay to the blower terminals was completely nuked. I think the heater was struck by lightning or something over the...

Update, finally received my ebay used fenwal and the process appears to be moving along fine, but the ignitor isn't glowing, blower comes on and gas valve opens. It's getting 115 at both leads, and measures 120ohms across the terminals but ignitor isn't getting hot??? Has this happened to...

I see that now I was reading the manual for a different fenwal for a different ignition system. The 35-66 energizes the ignitor and then the gas valve. However, it still should energize the blower first and this isn't sending any voltage to f2 so I believe the internal relay is toast. Waiting...

I ordered a fenwal, I'll update if it fixes everything or not.