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  1. #1
    Join Date
    Jun 2009
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    147
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    Rheem RGRL Gas Furnace

    Well, it was cool enough today, so I tested out the furnace for the first time. The low fire is coming in at a temp rise of about 30.. the spec range is 25-55, so it's a little low, but within range. When it kicks to high fire, it only gets to a temp rise of about 41, with a spec range of 35-65 and then the burner kicks off without the thermostat being satisfied. There are no error codes indicating limit being open, so what else could possibly be causing the burner to shut off before thermostat satisfied? I checked the combustion and exhaust flues and they are clear.

  2. #2
    Join Date
    Apr 2004
    Posts
    7,680
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    First thing is first...

    Use a jumper instead of a thermostat. You'll know in a hurry if it's something in the cabinet or in the control circuit.

  3. #3
    Join Date
    Jun 2009
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    Quote Originally Posted by docholiday View Post
    First thing is first...

    Use a jumper instead of a thermostat. You'll know in a hurry if it's something in the cabinet or in the control circuit.
    Turns out it was open limit. I finally figured out the blinking light codes. I reset the breaker and seems to be fine now.

  4. #4
    Join Date
    Sep 2002
    Location
    I don't know
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    The real question is which limit opened, and why?

    The problem will most likely recur
    I've discovered a natural law - everything gets progressively worse. Things only break down and become depleted. Life isn't worth living and everything is going to hell.

    Death is the messiah. Everything else is irrelevant and arbitrary.

  5. #5
    Join Date
    Jun 2009
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    147
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    Quote Originally Posted by amd View Post
    The real question is which limit opened, and why?

    The problem will most likely recur
    I think it happened because I had pulled the limit to test the static pressure using that access hole. Must have tripped it.

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