Question about 1991 Pontiac Bonneville

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Climate control system does not work-blower motor does.could it be the blower resister?

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Climate control actuator

Posted on Nov 03, 2009

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Posted on Jan 02, 2017

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Heater fan not working on my 2003 cavalier


From your symptoms I would suggest, inspect the Climate Control and the Blower Motor Resister. Locate and remove the resister and test. You are looking for power at the plug (going to the resister). One wire will always be hot (with the ignition key on). The other four wires are ground wires that through the resister, changes the blowers speed. Connect a test-light to 12volts positive, test that the test-light is working, and then start testing for ground. Unplug the resister and test at the plug. With the ignition key on, test each wire. Each wire should light up your test-light depending on the position of the speed control knob. If it passes then plug the resister back in and probe at the blower motor. The blower motor needs both ground and power to run. Find out which is missing and write back. Good luck.

Apr 26, 2014 | 2003 Chevrolet Cavalier

2 Answers

Heater Motor Speed Controller location lincoln town car 2000


I would check that the blower motor speed controller under the hood is getting a signal from the climate control. The speed controller will be a lot less expensive and goes more often then the climate control unit in the dash...

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You should really test the signal from the climate control to the blower speed control; if I where to try something I would go with the blower motor speed control... it may be called the blower resistor if you call for the part just make sure it matches up with the one you have on the car.

Good luck.

Apr 29, 2011 | 1996 Lincoln Town Car

1 Answer

My 97 buick lesabre limited heater/ac blower quit, it has the climate control,I checked all fuses.


REMOVE HEATER BLOWER MOTOR HOT WIRE BLOWER MOTOR IT.IF IT WORKS.YOUR AC AND HEATER CONTROL SWITCH IS FAULTY.CHECK HVAC FUSES AND CHECK BLOWER MOTOR RELAY.IF BLOWER MOTOR DONT WORK WHEN HOT WIRE REPLACE IT.IF ALL CHECK OUT GOOD.HAVE DEALERSHIP DO A DIAGNOSTIC TEST ON YOUR CLIMATE CONTROL SYSTEM.

Dec 02, 2010 | 1997 Buick LeSabre

1 Answer

2007 blower motor speed control for a Mercury Marquis. I only have high,is their is something besides climate control (act unit)., dash climate control is all low ampereage, and blower is high amps 30 0r...


there is a motor regulator in the rear of the heater near to the motor when it fails only full voltage goes though other speeds are controlled by the resister. looks like this
new-blower-motor-resistor-for-ford-mercury-lincoln-oe-6w7z19e624a-8w7z19e624a-9w7319e624aa-yw1z19e624aa-tptxtr3n11io0d2afxookjvk-1-0.jpg its screwed into the heater box.

Aug 09, 2017 | 2007 Mercury Grand Marquis GS Sedan

2 Answers

Blend door for front temp control is stuck in the 'cold' position this winter. Is there a way to manually move and fix the door to get some heat?


you have to replace the blend (heat/cold) door motor, you can try to remove motor and turn door and try to jam something in door handle slot ,that the part that the motor turns,hope this helps.

Dec 26, 2009 | 2001 Ford Windstar

1 Answer

Blower is on high all the time. Seems like the climate control system is not working. Didn't know if there is a blown relay? or a bad sensor?


No none of the above. There is no sensor for the blower and if the relay for the blower motor was blown then the blower won't get voltage hence wont turn on at all. Sounds to me like the climate control is shorted and is not allowing variable resistance to chance speed. Good Luck

Dec 07, 2009 | 2003 Chrysler Town & Country

1 Answer

Blower fan does not work on low or medium only on high. Lx model has auto climate control. wondering if it is blower motor, blower resister, or control (bad contacts). All buttons work on climate control....


Sounds like the problem is more with the blower motor assembly itself. The blower motor have micro-proccers built itnto them which comunicate with the control heads and do the actual regulating of the fan motor. Dealers have computers with diagnostic software which allows them to monitor what is happening in the eletronic controls of the vehicle. Electronic diagnostics without the diagnostic software makes it very diffecult to pinpoint the actual item causing the problem.

Jan 01, 2009 | Hyundai Motor 2003 Sonata

2 Answers

A/C Heater control doesnt work.... trips the antilock light


5 volts is not enough to run the blower sound like your blower resister is shorted out and back feeding the system did you check it?

Nov 02, 2008 | 1997 Chevrolet S-10 Pickup

2 Answers

A/c problems


most probable cause.. blower motor resister. & vaccuum leak to control blend doors or electrical actuator for blen door

Aug 02, 2008 | 2004 Chevrolet TrailBlazer

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