Question about Ruud UBHC Air Conditioner

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Rudd furnace I have a RUDD furnace model UGPJ-07-NAMGR. It had stopped working, so I replaced the thermostat but it is not the thermostat. When I hold the furnace reset button, the furnace will fire according to the setting on thermostat(heat or fan). As soon as I let go of the reset button, the heater stops working. It does not matter what I do to the thernostat, the heater will not fire. I crossed the red and white wire but nothing happens. The heater is supposed to fire when I cross wire, right? Thank You, David

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  • dchinoraks Jan 03, 2009

    Yes! when I connect them (red and white wire) together and let them connect for a minute, the furnace does not start.

    Usually, when I turn thermostat up for heat, I hear "Click" and heater starts.

    Thank you!


  • Danny Clark
    Danny Clark May 11, 2010

    When you cross white, you are basically just bypassing the T-stat.



    Please describe for me exactly what you are reffering to as the "furnace reset button" and where is it located?

  • Ken Bledsoe May 11, 2010

    When you cross is that meaning jump between them? R and W or red and white.

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You have a safety limit switch that is either bad or needs to be manually reset. Some have little buttons between the two wires going to the switch that you can push to reset. If not they are automatic switchs then one is bad. You have to do an ohms test to see if each switch is bad or good.

Posted on Jan 05, 2009

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Single mom, trying to get heat at midnight...I found the limit switch button between the 2 wires, it wiggles, but I can't get it to go in or out...

Posted on Dec 04, 2009

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