Question about 2001 Chevrolet Suburban

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Front heat does not work, rear heat does?

My rear heat controls work, but the front does not. Blower works but no heat from front controls.

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  • mwgdc Nov 09, 2009

    Thanks to keymac, tried his solution and it worked perfectly. Simple and saved lots of repair money.

  • Anonymous Mar 13, 2014

    Rear heat doesn't work
    Front heat works fine

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  • Contributor
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I'm just a regular diy'er, no training. Had same problem, 2001 Suburban, front blew cool air when heating, rear heat warmed up nicely. After reading other posts on other boards, took off the the heater hose clamps (make sure you remember which is which) at the firewall. With low pressure garden hose flushed left inlet/outlet first till I got good flow, then the right side, and back to left. Reattached hoses, started and tested. Heat blows just fine. I can't think of anything that could be damaged by this, but check with someone who know something first before trying it on your vehicle, but it worked for me. So far so good.

Posted on Oct 25, 2009

Testimonial: "Tried this simple solution and it worked perfectly. Who knows how much repair money I saved, thank you."

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Posted on Jan 02, 2017

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  • 718 Answers

SOURCE: front a/c heater blower wont work

Here is the order of checking;


) Check maxifuse 105
) Check fuse 24 on interior panel
) Check blower resistor
) Check power and ground at motor.
) May be bad motor

Posted on May 18, 2009

fphandyworks
  • 56 Answers

SOURCE: Rear heat blows cold air

one of the second heater core lines is clogged.

Posted on Jan 05, 2009

  • 1 Answer

SOURCE: 2003 Chevy Trailblazer - Rear Heat/AC Controls Don't Work

Sorry, I don't have an answer, but have the same problem. Did you ever figure out what was wrong?

Posted on May 26, 2010

  • 2 Answers

SOURCE: 2002 CHRYSLER T&C FRONT BLOWER NOT WORKING ON ANY SETTING

I had the same thing happen today except rear control works period (no conditions). I am going to test the leads to the front blower first while on. If voltage is there, then I will check the motor brushes - could be a cheap easy fix (~$6 + time). Alternatively you could replace the motor ($50+ plus time). If no voltage there then it is probably electronics.

It could be a resistor(s) but I believe it is unlikely that *all* the resistors would go at the same time.

Posted on Dec 18, 2008

  • 117 Answers

SOURCE: Front AC Blower quit working. Rear AC blower

The first thing I would do is check to see if a fuse is blown or bad relay. Then I would unplug the blower motor with a test light make sure you are getting power to the blower located on the far passenger side of the vehicle under the dash if it has power and good ground then suspect vaulty motor. If you are not getting power at the plug then you might have a bad switch or resister. If it does have a blown fuse remember they usually blow for a reason like faulty wiring or even a in the motor itself. I would also recommend that you change the ac cabin filters behind the glove box if they have not been changed most people neglect them on that vehicle because they are a little more difficult to change, after removing the glove box there is a metal bracket in the way of opening the cabin filter compartment. They wont cause a blower motor to not work, however they do restrict airflow to the evaporator and they protect you from pollen, dust, and even exhaust gases. Hope this helps.

Posted on Jul 08, 2009

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There is a blower motor control processor for the back blower - it takes input from the front control and the rear control and decides the fan speed. That processor could be faulty, or the blower motor, or a 30amp fuse in the engine compartment.
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My 2005 gmc yukon rear a/c or heat blower will not come on front a/c and heat work well


{: ) If the front a/c and heater is working fine, that's good. At least the problem can be isolated on the rear HVAC circuits only.
Check first the RR HVAC fuse 30amp at the underhood fuseblock and the IGN 3 fuse 10amp at the IP fuseblock. If you found them good, then you can begin diagnosing the blower circuits wirings and connectors.
A faulty blower definitely will not give any output. If it doesn't spin for some reason, rear a/c or heating cannot be circulated.
A faulty blower resistor or speed control processor can also cause a zero air output. Sometimes, the blower may only work at certain speeds only.
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Sometimes it can be a terminal connector being loose or burnt. However, the most usual cause for this type of problem is a faulty blower resistor.

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No heat up front rear heat works


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2002 CHRYSLER T&C FRONT BLOWER NOT WORKING ON ANY SETTING


I had the same thing happen today except rear control works period (no conditions). I am going to test the leads to the front blower first while on. If voltage is there, then I will check the motor brushes - could be a cheap easy fix (~$6 + time). Alternatively you could replace the motor ($50+ plus time). If no voltage there then it is probably electronics.

It could be a resistor(s) but I believe it is unlikely that *all* the resistors would go at the same time.

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