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Furnace comes on for 1 min then kicks off, repeats this cycle

Have Carrier 58GP075-3 furnace

The burners come on and run tell the blower kicks on, at the exact same time blower comes on burners go off.

Blower runs for about a minute, then at the exact same time blower goes off burners come on again, keeps repeating this cycle.

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MY FURNACE WOULD RUN FOR ABOUT TWO MINUTES , THEN THE BURNER WOULD GO OUT BUT THE BLOWER WOULD CONTINUE TO RUN , LONG ENOUGH TO COOL THE FAN LIMIT SWITCH DOWN , THEN IT WOULD START THE PROCESS ALL OVER. WHAT FIXED MY PROBLEM WAS THE SECONDARY HEAT EXCHANGER THAT IS LOCATED JUST ABOVE MY BLOWER MOTOR WAS PLUGGED WITH DIRT , WHICH RESTRICTED THE AIR FLOW , CAUSING THE FAN LIMIT SWITCH TO REACH 200 DEGREES AND SHUT THE BURNER DOWN . YOU'LL HAVE TO TAKE THE BLOWER MOTOR OUT TO GET TO IT , BUT MY FURNACE IS RUNNING PERFECT NOW

Posted on Jan 11, 2010

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Sounds like mine did
it was a realy switch

Posted on Feb 06, 2009

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