ReplyWe cannot give technical advice in the AOP forum.
New Guest
working on a ruud silhouette ii model number UGPH-07EAMGR furnace with an ignition issue. unit cycles properly, blower, pressure switch closes, gas valve opens but no spark for the ignitor. checked post on board for the ignitor with a wire to ground and got a single spark out of it during the ignition cycle. assumed it was the ignitor and replaced it, no luck. could the lack of a pulsating spark from the board be the result of a bad ground? also, the unit had had a freeze up issue due to dirty filter, created a lot of condensation which may have dripped down into the unit. Thoughts?
Global Moderator
We cannot give technical advice in the AOP forum.
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https://www.hvac20.com/ High efficiency equipment alone does not provide home comfort and efficiency. HVAC2.0 is a process for finding the real needs of the house and the occupants. Offer the customer a menu of work to address their problems and give them a probability of success.
Find contractors with specialized training in combustion analysis, residential system performance, air flow, and duct optimization https://www.myhomecomfort.org/
Professional Member*
Is it a spark or hsi ignition?
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New Guest
It is a spark ignition.
Regular Guest
Stay away from the ICM aftermarket board. Go OEM.Originally Posted by jmiller0394
Professional Member* / ARP Committee
If you had a wire to case ground and held other end to the spark terminal, and no sparky, then the board is the issue.
The spark will overcome a lousy ground and some bad connections. The spark needs to jump an air gap and will.
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New Guest
Thanks for the reply.
There is a single spark only. It doesn’t repeat or continue to spark say for 5 seconds or so. It doesn’t light with the single spark. I can light it during that cycle with a lighter and everything fires up, so I know the other interlocks are working. Sounds like the board is bad or going bad, correct?
Yes OEM for sure.
Global Moderator
What have you learned about it by testing with a meter?
*********
https://www.hvac20.com/ High efficiency equipment alone does not provide home comfort and efficiency. HVAC2.0 is a process for finding the real needs of the house and the occupants. Offer the customer a menu of work to address their problems and give them a probability of success.
Find contractors with specialized training in combustion analysis, residential system performance, air flow, and duct optimization https://www.myhomecomfort.org/
Professional Member*
If it sparked once , it can surely spark 100 times , so im going with board bad
Global Moderator
You have not given us anything in the way of a measurement. A real tech would give us some.
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https://www.hvac20.com/ High efficiency equipment alone does not provide home comfort and efficiency. HVAC2.0 is a process for finding the real needs of the house and the occupants. Offer the customer a menu of work to address their problems and give them a probability of success.
Find contractors with specialized training in combustion analysis, residential system performance, air flow, and duct optimization https://www.myhomecomfort.org/
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