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HOW TO REPLACE THE HVAC MODULE IN 2002 MONTANA

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My 2002 Cadillac Deville won't blow air directly to my face out of the vents, please help.


Center vents not working , is this what your saying ? Air comes out of the defroster vent or floor vent only ? Mode door stuck or mode door actuator bad !
Mode and Recirculation Actuators The mode and recirculation actuators are 2-wire bi-directional electric motors. Two control circuits enable the actuators to operate. The control circuits use either a 0 or 12 volt value to co-ordinate the actuator movement. When the actuator is at rest, both control circuits have a value of 12 volts. In order to move the actuator, the HVAC control module grounds the appropriate control circuit for the commanded direction. The HVAC control module reverses the polarity of the control circuits to move the actuator in the opposite direction.
The HVAC control module(IPM) determines the door position by counting motor pulses on one of the control circuits. These pulses are small voltage fluctuations that occur when the brush is shorted across two commutator contacts as the motor rotates. As the actuator shaft rotates, the HVAC control module(IPM) monitors the voltage drop across an internal resistance to detect the pulses. The HVAC control module(IPM) converts the pulses to counts with a range of 0-255 counts. The HVAC control module(IPM) uses a range of 0-255 counts to index the actuator position.
If the problem is the actuator the instrument panel has to be removed to replace it . Your best bet is to take your vehicle to a qualified repair shop .

Jun 28, 2016 | Cadillac Cars & Trucks

1 Answer

Where's the coolant level sensor located on a 6.0 '02 Chevy 2500 HD Silverado?


this might be important for you to know
Quote:

08-08-49-002: False Triggering of Low Coolant Level Warning Message (Reprogram HVAC Control Module) - (Feb 13, 2008)

Subject:
False Triggering Of Low Coolant Level Warning Message (Reprogram HVAC Control Module)

Models:
2007-2008 Chevrolet Silverado 2500 and 3500 Heavy Duty Series Only
2007-2008 GMC Sierra 2500 and 3500 Heavy Duty Series Only
with 6.6L Diesel Engine (VIN 6 -- RPO LMM)

--------------------------------------------------------------------------------
Condition
Some customers may comment that a "COOLANT LEVEL LOW ADD COOLANT" message is displayed in the Driver Information Center (DIC) even though the coolant level is normal.

Cause
This condition may be caused by a false reading during off-road driving or in high slush conditions.

Correction
Do This - Reprogram the HVAC control module.
Don't Do This - Do not replace the coolant level sensor, HVAC control module or radiator surge tank.


A revised calibration has been developed to address this condition. Technicians are to reprogram the Heating Ventilation and Air Conditioning (HVAC) control module with the latest software available on TIS2WEB. Refer to the Service Programming System procedures in SI. As always make sure your Tech 2 is updated with the latest software version.


Warranty Information
For vehicles repaired under warranty, use:
Labor: Operation D4707
Description: HVAC Control Head Module or Assembly Reprogramming with SPS
Labor Time: Use Published Labor Operation Time

Dec 02, 2013 | 2002 Chevrolet Silverado 2500HD

1 Answer

I have a 2002 pontiac montana and the wipres won't go into intermitant mode. They continue to operate without hesitating. How can I fix it?


the cover on the wiper motor is intermitant module . change it most of the problem come from that module

Oct 04, 2013 | 2002 Pontiac Montana

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2002 pontiac montana. where are the relays for the hvac blowers. the front and rear blowers dont work I have already replaced the resisitor in the front blower. there are some relays behind the glove box...


I think these two problems have a common solution. When they do not work check for power at the HVAC Blower Fuse in the instrument panel fuse block. Check this with a volt meter. You should see battery voltage at the fuse. If you see no voltage or very little than I would bet you have a bad ignition switch. The switch is what supplies power to the fuse.

Jul 22, 2013 | 2002 Pontiac Montana

1 Answer

2002 century, Hvac dash control module fan only works on high. Do I need to replace the module and how hard is it.


You may not have to. If the blower resistor is near the blower motor that should be tested first(cheaper part too). Sometimes they go and the result is a one speed or no speed fan.

Jun 16, 2013 | 2002 Buick Century

1 Answer

2002 pontiac montana shakes when stopped and blinks service engine soon


You have problem with coils and module.One of things is bad and need to replace.Get code reader to check the code.

Mar 25, 2013 | 2002 Pontiac Montana

1 Answer

How to replace " cabin


The 2001 model Aztex has 2 cabin filters, they usually come 2 to a box when you buy them.
The charcoal carbon filters are the best.

Removal:

•Open the IP compartment door.
•Remove the rear inside IP compartment door.
•Open the HVAC module assembly access door
•Remove the RH passenger compartment air filter from the HVAC module.
•Slide the LH passenger compartment air filter to the HVAC module opening.
Remove the LH passenger compartment air filter from the HVAC module.

Installation Procedure:

•Install the LH passenger compartment air filter into the HVAC module opening.
Slide the LH passenger compartment air filter toward the left side of the HVAC module.
•Install the RH passenger compartment air filter into the HVAC module opening.
•Close the HVAC module assembly access door.
•Install the rear inside IP compartment door.
•Close the IP compartment door.

I Hope this information is helpful.

Sep 03, 2011 | 2001 Pontiac Aztek

1 Answer

2002 pontiac montana passanger pwr window


I beleive you need to change the Power Window Switches Module in the drivers side door panel, as these connections are interlinked within this module and it is usually the first part that fails. Especially that you already changed the switches & motor in the passenger door and it still does not work. Once you remove the dual switch module in the driver's side door, you will understand what I mean. Plus it is really easy to access. Good luck! I have the same model, Claude

Feb 19, 2010 | 2002 Pontiac Montana

1 Answer

DRL Location 2002 Silhouette


Hi the DRL module is located under the IP (dash) just left of the HVAC(heater control)

May 06, 2009 | 2002 Oldsmobile Silhouette

1 Answer

Removing a heat-core


not only does the dash require removal,but you will also need to completely remove the hvac module assembly from the vehicle after the dash is out of the way. the module will have to be diassembled in order to replace the core.--hvac module removal will require ac refrigirant recovery and coolant replacement.--it sounds like a lot of work but should only take you about one good saturday if its your first time around the block.---good luck.

May 15, 2008 | 2002 Chevrolet Suburban 2500

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