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GMC FURNACE MODEL GMPN060-3

HELLO MY NAME IS STEVE: MY PARENTS HAS THE ABOVE FURNACE AND IT WILL NOT RUN CONTINUOUSLY TO HEAT THEIR HOUSE ABOVE 70 DEGREES. IT ALWAYS SHUTS OFF PREMATURELY AND THEN STARTS BACK UP 5 -10 MINUTES LATER. EVEN IF THE THERMOSTAT IS JUMPERED OUT IT WON'T STAY RUNNING ...

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I've got the same furnace. I had to replace the auxilary pump that moves the water to the floor drain. The pump plugs into an outlet on the furnace and even has a light switch to turn the power source on and off.
If your folks have the same set up, make sure the switch is in the ON position.

Posted on Jan 24, 2008

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Sounds like s safety or overheat switch is tripping. Clean or replace air filter, inspect the venting for restrictions and make sure all registers are open all the way and not blocked by furnatue. Also check the condensate to make sure it is draining. If it continues to not heat, call a technician.

Posted on Jan 23, 2008

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