Question about 2002 Jeep Grand Cherokee

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Heater/Front Defroster My front defroster and heater only blows cold air. Is this a fuse problem?

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Could be a heater valve problem

Posted on Oct 23, 2008

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Posted on Oct 23, 2008

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My front defroster does not work but the back heater works.. if the van is running it will heat up but when you start driving the gage goes back to cold it blows cold but defroster wont work at all


Change the thermostat. Follow the top radiator hose to the engine. There is to T stat. That will get your heat back. on the defroster, it doesn't blow out air? doesn't switch vents? or just not get hot? Year make and model please.

Dec 02, 2015 | Cars & Trucks

1 Answer

The rear heater blows cold air and front does not blow at all. The only place that warm air comes out, is the defroster vents on the dash by the windshield. It actually warms the entire vehicle, but n


i hadsimale problems on my taho the ac wul not blow cold n the back only the heater would blow and the front would not blow i had to chang the front blower motor and the blower motoer relay in the back every thing is on the top of the rt pass wheel hump swap them out there the same parts to see what broke hat stuf is expencive hope this helps

Oct 17, 2012 | 2004 Chevrolet Tahoe

1 Answer

Heater doesnt work


To troubleshoot this types of problem,click the link below :---
Car heater blowing warm, but not hot air?http://schematicsdiagram.blogspot.com/2011/12/car-heater-blowing-warm-but-not-hot-air.html

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Engine Overheats and heater blowing cold?

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

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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

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

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Heater blows intermittently and temp gauge goes erratic?

http://technoanswers.blogspot.com/2012/01/heater-blows-intermittently-and-temp.html

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Heater blows cold?

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

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Heater/AC blower motor not working?

http://technoanswers.blogspot.in/2012/02/heaterac-blower-motor-not-working-on.html

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A/C, heater, defroster fan, not working? http://technoanswers.blogspot.in/2012/02/ac-heater-defroster-fan-not-working.html Heater problem?

http://technoanswers.blogspot.in/2012/02/heater-problem-on-isuzu-trooper.html

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This will help.Thanks.

Mar 27, 2012 | 1994 Volvo 960

1 Answer

Air works great but no heat just blows cold air


For this types of problem,i suggest you to check this help links:----Car heater blowing warm, but not hot air?http://schematicsdiagram.blogspot.com/2011/12/car-heater-blowing-warm-but-not-hot-air.html
---------A/C, heater, defroster fan, not working?http://technoanswers.blogspot.in/2012/02/ac-heater-defroster-fan-not-working.html
--------Heater problem?http://technoanswers.blogspot.in/2012/02/heater-problem-on-isuzu-trooper.html
---------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.

Sep 05, 2011 | 2007 Suzuki SX4

1 Answer

2002 dodge caravan front heater blowing cold air all the time . upper heater vents and defroster work fine. how do i fix the floor heater?


Change your thermostat I was having the same problem and also check that you have enough Preston. Hope this helps.
Kim

Jan 24, 2010 | 2002 Dodge Caravan

1 Answer

Front defogger blows out heater vent when set on DEF. All of the heater, a/c, settings work properly. One day, I turned on the DEF and the warm air blows out of the heater vents, not the defroster area. I...


Sounds like the flap valve in your vent system that allows air to go to the defrosters is either jammed or broken. Unfortunately you will have to take the vent system apart to look.

Nov 05, 2009 | 1989 Oldsmobile Cutlass Ciera

2 Answers

When i have the heater/defroster on the heater below blows cold air while the defrost blows hot. when i switch to just defrost the bottom heater stays on and blows cold air. when i have front dash and...


It sounds like you have a blend air door stuck. This is in the housing of the heater a/c blower unit under the passenger side of the dash. There is a motor on the top of the housing that could possibly be stuck or on working.

May 10, 2009 | 2003 Dodge Durango

2 Answers

1997 chevy suburban


most american cars force the defroster to blow cold air, this is not a problem, it does this by design.

Dec 23, 2008 | 1999 Chevrolet Silverado 1500

2 Answers

Heat wont blow through heater or defroster vents


Had the same problem. believe it or not i changed the gas cap and got heat all around. something about pressure.

Dec 05, 2008 | 1993 Chevrolet Corsica

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