Question about 2001 Jeep Grand Cherokee

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2001 Grand Cher

Blows out cold air when defroster is on, or when you just turn on the heat, blows cold air. No leaks or smells so dont think it is heater core please help

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  • 2 more comments 
  • mullies Jul 26, 2008

    half of the vents do the same center right to the full right interier

  • Kubira Jul 31, 2008

    How do you fix this problem? Please assist as on my Jeep it blows the wrong temperature air on the right side :(

  • kycrossroads Nov 08, 2008

    When my heat is on, the right side only blows cold air, and the defrost is nearly nothing...this was for about 2 weeks. Now I get only Cold air from both sides....can anyone help??

  • Anonymous Mar 27, 2014

    use blue devil to stop oil leak, now heater is blowing cold air and car running hot

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My Jeep has this problem too. Looked into installing a direct wire heater just to get through the winter, but really don't want to risk frying the electrical system.

The good news is I think I know what's wrong with your heater

The bad news is you are looking at probably about $140 in parts and another $1000 in labor (Yes not a typo).

There are doors that open and close to adjust the temperature for the separate zones. The motors that move the doors are supposed to sense when they are fully open or closed and stop. The problem is the doors break in such a way that the motor that drives them doesn't stop and they snap right off the shaft they are poorly mounted on. Jeep is aware of the problem. They described a fix to the poor design in a technical service bulletin #24-001-04 (apparently released in Jan '04). There is a quick and free way to test the climate control module.

Go to this website http://en.allexperts.com/q/Jeep-Repair-817/2008/7/2000-Jeep-GC-poor.htm it describes the procedure (takes about a minute to do) and decodes the fault code(s).

If you are brave or really good at taking apart cars you can go to this website http://www.wjjeeps.com/hvac_sub_assembly.htm to get the procedure to R&R the climate control module yourself and maybe save yourself a grand. Might cost you some down time though as it involves removing the whole dashboard (FOLLOW WARNING INVOLVING DISABLING AIRBAG!!!)

Hope this helped! Sorry to be the bearer of bad news.

John

Posted on Nov 11, 2008

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Im not sure sounds like my problem but my 2001 grand ch.does it only from the right half of the vents .i heard it was the code p0161 o2 2/1 heater circuit oxygen sensor heater element malfunction code p0158 o2 2/2 shorted high oxygen sensor input voltage maintained above the normal operating range

Posted on Jul 26, 2008

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Make sure radiator is full of coolant, this system heats the vehicle, also if you can smell coolant it may be a bad or leaking heater core? Hope this helps?

Feb 23, 2015 | 2012 Ford Mustang

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Dodge durango 2001 fogging up windows not defrosting


It's most likely your heater core that is causing the problem it could be leaking either from the core it's self causing anti freeze to get into your vents or from one of the hoses leading to it.....I am assuming that when your heat is on there is a dampness in the air this is what is causing the windows to fog up.

Feb 17, 2014 | 2001 Dodge Durango

1 Answer

My heater does not blow in floor in a dodgeram 1500


the heater vacuum motor and lines needs to be checked.Also get the blend door checked.

NO HEAT ON FLOOR VENTS

---------

As per your problem mentioned. There are few solved help links to troubleshoot these problems. Go through the list and Click the link below:----

2000 Toyota Avalon: No heat on Passenger Side?

http://whatisbyme.blogspot.in/2012/05/2000-toyota-avalon-no-heat-on-passenger.html


------------

No heat on Oldsmobile Silhouette?


http://technoanswers.blogspot.in/2012/02/no-heat-on-oldsmobile-silhouette.html

------------

Heater blows cold?

http://schematicsdiagram.blogspot.in/2012/02/heater-blows-cold.html

-----------

Heat blows cold on drivers side and hot on passenger side?

http://schematicsdiagram.blogspot.com/2011/12/heat-blows-cold-on-drivers-side-and-hot.html

----------

Hot air on the driver's side vents only?

http://repairhelpcenter.blogspot.com/2012/01/hot-air-on-drivers-side-vents-only.html

--------------

Temperature gauge does not move and no heat when heater is ON?

http://technoanswers.blogspot.com/2012/01/temperature-gauge-does-not-move-and-no.html

-----------

1992 Toyota Camry: A/C Control light Flashing and A/C not Blowing Cold?

http://technoanswers.blogspot.in/2012/04/1992-toyota-camry-ac-control-light.html

--------------

No heat, blower blows only cold?

http://technoanswers.blogspot.in/2012/02/no-heatblower-blows-only-cold.html

----------

Ford F150 Ac only blows through defrost vents?

http://technoanswers.blogspot.com/2012/01/forf-f150-ac-only-blows-through-defrost.html

----------

Dodge A/C come out of defrost vents only?

http://technoanswers.blogspot.com/2012/01/dodge-ac-come-out-of-defrost-vents-only.html

---------

Ac vacuum line on dodge cummins?

http://technoanswers.blogspot.com/2012/01/ac-vacuum-line-on-dodge-cummins.html

---------

Ford ranger AC blows cold through defrost vents instead on cabin vents?

http://technoanswers.blogspot.com/2012/01/ford-ranger-ac-blows-cold-through.html

----------

2005 Chrysler PT Cruiser: A/C Blows Warm?

http://whoisbyme.blogspot.in/2012/06/2005-chrysler-p8t-cruiser-ac-blows-warm.html

-------------

2009 Mercury Grand Marquis: A/C blows Cold From Defrost Vent Only?

http://whoisbyme.blogspot.in/2012/06/2009-mercury-grand-marquis-ac-blows.html

-----------

AC not blowing through Vents on 2007 Chevy Trailblazer?

http://schematicsdiagram.blogspot.in/2012/04/ac-not-blowing-through-vents-on-2007.html

----------

Passenger side temperature is warm air out of dash vents?

http://schematicsdiagram.blogspot.in/2012/04/passenger-side-temperature-is-warm-air.html

----------


These will help.

Thanks.

Nov 28, 2012 | Cars & Trucks

1 Answer

No heat from vents


As per your problem mentioned. There are few solved help links to troubleshoot these problems. Go through the list and Click the link below:----

2000 Toyota Avalon: No heat on Passenger Side?

http://whatisbyme.blogspot.in/2012/05/2000-toyota-avalon-no-heat-on-passenger.html

------------

No heat on Oldsmobile Silhouette?


http://technoanswers.blogspot.in/2012/02/no-heat-on-oldsmobile-silhouette.html

------------

Heater blows cold?

http://schematicsdiagram.blogspot.in/2012/02/heater-blows-cold.html

-----------

Heat blows cold on drivers side and hot on passenger side?

http://schematicsdiagram.blogspot.com/2011/12/heat-blows-cold-on-drivers-side-and-hot.html

----------

Hot air on the driver's side vents only?

http://repairhelpcenter.blogspot.com/2012/01/hot-air-on-drivers-side-vents-only.html

--------------

Temperature gauge does not move and no heat when heater is ON?

http://technoanswers.blogspot.com/2012/01/temperature-gauge-does-not-move-and-no.html

-----------

1992 Toyota Camry: A/C Control light Flashing and A/C not Blowing Cold?

http://technoanswers.blogspot.in/2012/04/1992-toyota-camry-ac-control-light.html

--------------


No heat, blower blows only cold?

http://technoanswers.blogspot.in/2012/02/no-heatblower-blows-only-cold.html
----------

Ford F150 Ac only blows through defrost vents?

http://technoanswers.blogspot.com/2012/01/forf-f150-ac-only-blows-through-defrost.html

----------

Dodge A/C come out of defrost vents only?

http://technoanswers.blogspot.com/2012/01/dodge-ac-come-out-of-defrost-vents-only.html

---------

Ac vacuum line on dodge cummins?

http://technoanswers.blogspot.com/2012/01/ac-vacuum-line-on-dodge-cummins.html

---------

Ford ranger AC blows cold through defrost vents instead on cabin vents?

http://technoanswers.blogspot.com/2012/01/ford-ranger-ac-blows-cold-through.html

----------

2005 Chrysler PT Cruiser: A/C Blows Warm?

http://whoisbyme.blogspot.in/2012/06/2005-chrysler-p8t-cruiser-ac-blows-warm.html


-------------

2009 Mercury Grand Marquis: A/C blows Cold From Defrost Vent Only?

http://whoisbyme.blogspot.in/2012/06/2009-mercury-grand-marquis-ac-blows.html

-----------

AC not blowing through Vents on 2007 Chevy Trailblazer?

http://schematicsdiagram.blogspot.in/2012/04/ac-not-blowing-through-vents-on-2007.html

----------

Passenger side temperature is warm air out of dash vents?

http://schematicsdiagram.blogspot.in/2012/04/passenger-side-temperature-is-warm-air.html

----------


These will help.

Thanks.

Nov 28, 2012 | 2006 Ford Taurus

1 Answer

My 2000 jeep grand cherokee blows out cool air not cold and when you turn the heat on it smells like antifreeze any suggestions on what it may be?


Yes the heater core is starting to leak insidet he vehicle and the other could be low freon stuck temp lincage or motorJohnny

Mar 16, 2012 | 2000 Jeep Grand Cherokee

1 Answer

Heater core is working properly but car will not blow hot air only cold air i am thinking the flapper that controls hot \ cold is stuck in the cold air position


To troubleshoot this types of problem,click the link below :----http://howtobyme.blogspot.in/2012/02/heater-blows-only-from-defrost.html
--------Go through the procedure to confirm the issue.

------
Engine Overheats and heater blowing cold?

http://howtobyme.blogspot.com/2011/11/engine-overheats-and-heater-blowing.html

---------
Heat blows cold on drivers side and hot on passenger side?

http://schematicsdiagram.blogspot.com/2011/12/heat-blows-cold-on-drivers-side-and-hot.html

-----------


This will help.Thanks.

Jan 25, 2012 | 2001 Buick LeSabre

1 Answer

1998 grand prix no heat on 1 side


thats most likely what it is. either that, or something has fallen down the defrosters and its blocking the blend door from opening or closing

Jan 21, 2009 | 1998 Pontiac Grand Prix

1 Answer

Heat works on driver side, passenger side blows cold air.


Did you check your coolant level or was it low and you added to it at some point? If so the system my need to be bleed or worst case the thermostat is going bad.

Jan 02, 2009 | 2001 Jeep Grand Cherokee

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