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rheem furnace model RGLG-O7NAMGR - Burner does not stay lit


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3 replies to this topic

#1 pophouston

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Posted 08 January 2014 - 12:49 PM

I have a rheem furnace model number RGLG-07NAMGR - that starts as the flow chart shows that it should but the burner starts as it should but then only stays on for about 1min. I repeats that senerio 3 times and then nothing. The flame sensors seem to be some type of optical devices that I cleaned with a soft cloth. but the problem stilll persists. The fcb led status lights show green.  I'm wondering if i should replace the flame sensors or what other trouble shooting should or might be done

 

thanks



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#2 Dan Webster

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Posted 08 January 2014 - 07:56 PM

Most sensors are metal rods which hang out in the flames. They change in resistance telling the control the flame is lit. Sanding down the sensor helps. Video:http://www.youtube.c...h?v=I86joWL66aE




Edited by Dan Webster, 08 January 2014 - 07:57 PM.

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#3 KCTBURY

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Posted 09 January 2014 - 01:53 AM

Possibly an air flow problem.  The Evaporator coils may be dirty or clogged filter. Sounds like the high limit thermostat is tripping because too much heat in the exchanger.  

 

Possibly a draft induction problem. Clogged vent pipe or bad induction or pressure switch or tubing to pressure switch.



#4 Dan Webster

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Posted 09 January 2014 - 12:06 PM

Yeah if the sensor was good I would be looking for an open rollout/limit switch.


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