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JJboy 10-28-2012 09:31 PM

Igniter Silicon Nitride testing
Do you guys know if ALL Igniter Silicon Nitride operates with 70 ~ 80V or there are some models that operate with 120V like the Silicon Carbide? Also the resistance is around 11 - 17ohms.

I'm asking this because I'm working on a Goodman GMVC080 and the igniter glow but the burners doesn't light. The controller board is send 120V and the gas valve is open normally. The resistance on the igniter is 50ohms. I replaced with one igniter that has 15ohms and the furnace back to work.

hvactech126 10-28-2012 09:51 PM

There are some models that do work with 120V. There are a number of carbide replacement nitride ignitors that work with 120V. For Example:

Marty S. 10-28-2012 09:52 PM

Not all of them do JJ. Lennox surelite for example starts with over 100v on the first fire then drops the voltage 2-3% on each fire after that until it won't light then it bumps it up to the next step. After 5000 ignitions it starts the sequence all over. The resistance runs 15-19 ohms on those.

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