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I have a 2005 Pontiac Grand Prix .. I took a long trip and used my air circulator at the end of my trip it wouldn't shut off so a friend had a mechanic look at it he detached the blower fan so my battery wouldn't die so now I have no heat, AC or defroster ..Can anyone tell me what my problems is ???

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-Try to plug it back on. If the problem is gone, you should be okay.
If not and the blower still keep running like before.
-What you need to do:
-Unplug the "Blower Relay" If the blower is OFF then replace the relay.
Sound like the blower's relay stuck at (ON POSITION)

Mai

Posted on Oct 18, 2013

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Try cycling the switch at the furnace to reset the blower board. If this doesn't work remove the green wire from the blower board(computer board) to eliminate a shorted t-stat or shorted wire between the furance and t-stat. If blower remains on, then blower board is shorted. I've seen all these problems.

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I recommend you getting service its a safety thing. the humming is the transformer and is normal.. good luck Tom

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