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Hi.. I have a York PC9 (Modulating Upflow with ECM Motor).. at least that is what my service manual says.. After reading a number of posts, I was able to determine the error code (7 red flashes). I believe the furnace is locked out because of no ignition... the manual suggests checking the gas supply, ignitor, gasvalve and flame sensor.

Is this something I can do? Is it just a regulating type thing, I noticed there is a regulating knob... or is this just a cleaning problem that perhaps I might be able to do? If I turn on the blower from the thermostat, then try again, it sometimes works.. I have also turned off the power for a few seconds, then back on.. the light begins to flash a slow green, and the furnace once again seems to be working.

If I had to call a technician, would you recommend one that works specifically on a York Furnace, even though many advertise they work on all brands.

Thanks,

Ken
 

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If it works sometimes its not the HSI. Do NOT turn any knobs. You may want to pull the flame sensor and clean it with steel wool, or a 3M pad. Do NOT use sand paper or emory cloth.

A York or Luxaire dealer would probably be better. However, many companies do have people qualified to work on most brands and models. Modulating furnaces have their own quirks though.
 

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York guy may be better as they would have access to any TSB tech service bulletins for any recalls/factory known issues with it. Most mod furnaces are SO complicated it is best to get a dealer IMO. No untrained tech will fix a Lennox SLP mod I can bet.
 

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York guy may be better as they would have access to any TSB tech service bulletins for any recalls/factory known issues with it. Most mod furnaces are SO complicated it is best to get a dealer IMO. No untrained tech will fix a Lennox SLP mod I can bet.
I got a 20 pound sledge hammer that can fix any mod furnace. LOL
 
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