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How do i fix the heater in my 2001 jeep grand cherokee

I need to know how i can get the heater to work in my 2001 jeep grand cherokee...the air works fine but doesnt blow warm air at all?

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If the heater hoses are hot, the problem may be a faulty blend door under the dash. The blend doors direct air thru the heater core and the vents.

Posted on Jan 18, 2013

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Posted on Jan 02, 2017

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SOURCE: Heater problems on my 2000 Jeep Grand Cherokee. Please Help!!

THis is a know problem with Jeep GC. If only one side is cold and the other is hot and there are no controls error codes. It is likely a broken temperature blend door on the faulty side (w/ dual controls). Dealer charges a lot to fix ~$800. There is a kit and instructions sold on EBAY to replace the part for $100. Seller claims that a relative novice can fix w/o removing the entire dash board as the dealer does. Has sold hundreds of kits....people seem satisfied....you may check it out. Search Heater Blend Door Jeep on ebay. Replacement parts are aluminum instead of OEM plastic.

Self Diagnostics on HVAC system. Jeep GC has built in diagnostics and will return error codes on the temp display if it is otherwise. Simple to display.
1) Press A/C and Recir button simutaneously
2) Rotate driver temp control knob clockwise then release buttons
3) If no controls error a code of "0" or "00" will be returned.
4) Error codes listings can be found on-line if anything but zero

Dealers charge $45 to run the same check

Posted on Jan 21, 2009

  • 31 Answers

SOURCE: 2005 jeep grand cherokee ac blows cold only on drivers side

I agree, these vehicles have a problem with the blend doors and since the accuators hit the door when it opens and closes, it breaks the doors. and it's a huge job to replace them.

Posted on Mar 12, 2009

Mikey108
  • 475 Answers

SOURCE: Heater not working

Depending on what package the Jeep came with, you could have a broken or disconnected vacuum line to the heater doors.
If it's electronic, there could be a blend door accuator not working.
There could be a bad heater control valve or just a engine thermostat that's staying open all the time.

Posted on Oct 14, 2008

  • 491 Answers

SOURCE: Grand Jeep Cherokee Heater Doesn't Work

water pump could be bad and leaking from the weap hole. you have no heat cause theres a hole in the coolant system

Posted on Jun 09, 2009

JMMARRERO59
  • 77 Answers

SOURCE: 2001 jeep grand cherokee heater problem

BLEND DOOR FOR RIGHT SIDE BROKE INTO THE A/C SIDE. TO REPAIR PROBLEM WILL NEED TO REMOVE DASH AND HEATER/EVAP CORE BOX.

Posted on Jan 08, 2009

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1 Answer

Jeep Grand Cherokee 3.1 2001 air con working but no hot air is it just thermostat need change or is it more problem?


Check hoses going to heater core. Do both get hot? If so, problem may be a "blend" door failing to actuate due to vacuum leaks or bad actuator. If neither get hot, change thermostat.

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1 Answer

2001 Jeep Grand Cherokee


Do you have manual lock in hubs??? Alot of these work off of vacuum. check you hoses, and also a pull off valve which enguages the front end. One bolt to replace this the valve the enguages the front end.

The defrost has leaves in heater box , blocking air flow on pasenger side most likely???? Check it out.

Dec 29, 2008 | 2001 Jeep Grand Cherokee

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