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deljanderson · Dec 8, 2008, 04:23 PM

Just moved in the air works fine, now that it is cold we turned on the heater and No HEAT, Can you please help my hands are frozen and my wife in kicking me out the house if I blow this one. The name is Comfortmaker RPJ 11, Can't see any fames, hear motor running.

KC13 · Dec 8, 2008, 04:31 PM

Observe the operating sequence from start-up with the front access panel removed. Use your eyes and ears-listen for clicks. Hissing sounds (may be faint). Post back with observations after about five minutes.

deljanderson · Dec 8, 2008, 05:15 PM

There is a click but no flame

KC13 · Dec 8, 2008, 06:38 PM

If you don't see a glow from the burner area prior to the click, you likely have a failed hot surface ignitor.

edfromga · Dec 20, 2008, 01:46 PM

Originally Posted by KC13

If you don't see a glow from the burner area prior to the click, you likely have a failed hot surface ignitor.

I have the same problem, I think, as this. If I leave the unit off for an extended period (say overnight), everything will work fine for a while. Once the room drops below the target temperature and needs to go through another heating cycle, everything seems to work well for a few minutes and then the burners go out and won't re-light. The ignitor lights, the unit clicks, but no flame comes from the gas orfices. I'm not getting any flashing codes from the panel light.

I replaced the flame sensor, but that didn't fix the problem. Like a lot of people, I'm having a tough time right now, and if I can solve this on my own, I want to do that. I'll understand if it's a job for the experts. Thanks for any help anyone can provide.

KC13 · Dec 20, 2008, 02:05 PM

Brand and model number?

edfromga · Dec 22, 2008, 09:04 AM

Originally Posted by KC13

Brand and model number?

Comfortmaker RPJII; Model no: GUI075A012IN.

KC13 · Dec 22, 2008, 09:37 AM

If the furnace malfunctions, the self-diagnostics should produce an LED fault code. Perhaps the unit is okay but the thermostat is causing short-cycling. Try this: turn off power to unit, remove "R" and "W" wires from thermostat and connect them together, turn power on and run unit, see if problem repeats. You may have to try cycling unit on/off a few times to test full operating sequence. If problem goes into hiding, start looking closer at the thermostat.

edfromga · Dec 22, 2008, 02:40 PM

Originally Posted by KC13

If the furnace malfunctions, the self-diagnostics should produce an LED fault code. Perhaps the unit is okay but the thermostat is causing short-cycling. Try this: turn off power to unit, remove "R" and "W" wires from thermostat and connect them together, turn power on and run unit, see if problem repeats. You may have to try cycling unit on/off a few times to test full operating sequence. If problem goes into hiding, start looking closer at the thermostat.

Thanks for the quick reply.

After observing the unit closer (I had to run it with the bottom cover off), I did get a one flash diagnostic (system lockout due to retry). I did a cleaning on the "to" and "from" of the pressure sensor and that seems to have solved things for now.

Thank you again, and as soon as I have the money I'll have a qualified professional come in to do the regular service on it.