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Old 11-18-2009, 01:10 PM   #1
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Rheem Criterion Furnace


I have a furnace that will not always come on.
It worked fine the first time I used it this fall, subsequently it stopped when it came up to temp and would not come on again automatically after the room temp dropped. I found that slapping the front cover of the furnace made it ignight, the fan then came on and it ran OK for a while, then stopped and wouldn't come on again.
Had a local repair man look at it; he couldn't find the problem and of course it ran perfectly while he was there.
Any suggestions?

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Old 11-18-2009, 01:18 PM   #2
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How old is it? Post the model and serial#. Does it have a viewing port on the lower door with LEDs flashing inside? If so count the flashes and look on the legend on the back of the door for the code and report back.

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Old 11-18-2009, 01:30 PM   #3
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Thanks Yuri, I'll check it out and get back with you.
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Old 11-18-2009, 01:31 PM   #4
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Gotta go do a real call now, back later.
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Old 11-19-2009, 11:14 AM   #5
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Yuri,
Sorry for the delay, I only have internet access at work and life is further complicated by being on crutches after foot surgery; why do furnaces know about these things?
Model # RGPH-07NAUER
SERIAL 3 VR8205H 8016.
There are 2 green lights visible through the oval window; right on is on all the time, left one blinks until I slap the furnace then is satays on.
I was not able to remove the lower front casing and there weren't any instructions that I could see that would be of help.

Any suggestions?
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Old 11-19-2009, 06:10 PM   #6
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The error code is buried in the electrical wiring diagram on lots of those and you have to remove the lower door for that. Slapping is NEVER a good thing and you should get a Pro to check it. May have a damaged circuit board, loose connections etc etc. Try leave it off with the code flashing and get a better tech to check it. I personally will cycle a unit up to 20 to 30 times in a row to catch intermittent problems. Most guys don't have the patience for that but a good one will. That unit has a history of pressure switch sticking open failures but we need that code.
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Old 11-20-2009, 09:34 AM   #7
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Yuri,
Thank you for the advice, I have someone coming to look at it, the trouble is that there aren't many repair guys out here who care enough to take the time required and posess your attention to detail.
I will keep all your fine advice on hand, I just hope this guy knows what he is doing.
Thanks for all the help.

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