2002 Buick heater problem


Old 12-28-09, 01:58 PM
Thread Starter
Join Date: Dec 2009
Location: Georgia
Posts: 2
2002 Buick heater problem

I have a 2002 Buick LeSabre Limited and when the heater is in the Auto or Manual mode there is very warm air discharging from the passenger side, but cool air from the driver's side even when the recirculate mode is selected. Why and how do I fix it?
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Old 12-28-09, 06:32 PM
Join Date: Jul 2009
Location: Washington State
Posts: 312
Left hand air door motor is bad or logic module has gone bad since the right works I'd go with the LH motor first. Since the module will kill both sides 98% of the time. The motor is on the left side of the HVAC suitcase has a shape like a triangle with a plug going in with 5 wires on a 6 pin plug. The only voltage checks you can do are 12v on the brown wire and a 5 volt ref sig on the gray wire (located at opp. sides of the plug the other wires are off the motor itself telling the comp where its at and one from the comp that will range from 0 to 5 volts (dark blue) but you have to have the motor plugged in to get the logic module to put out on this one tough to get at unless the motors already out.

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