Question about Buick Cars & Trucks
I would think the problem lies with the blower motor, as the motor carbon brushes wear down the operation can become erratic. Next time it won't run hit the blower motor with a hammer handle or something like that and see if it starts up, if it does replace the blower motor.
Posted on Oct 31, 2012
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Posted on Jan 02, 2017
If it will not switch to any different positions,and you did not have this problem prior to repair.Check for a leaking vacuum line to the control unit.The line should run through the firewall to the control unit.Good Luck!!!
Posted on Aug 04, 2008
SOURCE: Heater/AC fan only works on High
Bencar1 is right. The problem is probably the resistor. But it also could be a burned terminal in the 4 prong plug that attaches to the resistor. There will be burn marks on one of the prongs of the resistor if this is it. Look for the obvious. Good luck.
Posted on Nov 11, 2008
it should be under dash next to gas peddle on left end of heater box not that hard 2 screws and a plug. its called heater blend door actuator.
Posted on Jan 28, 2009
No the motor is not bad or going bad, the heater blower motor resister is bad, thats regulates the blower speeds, its located under dash by heater motor 2 screws hold in heater box with a electrical plug to it.
Posted on Feb 17, 2009
the resister is usually located in the air box above the passengers feet ,high indicates the resistor needs to be replaced
Posted on Sep 04, 2009
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