Question about 2002 Jeep Grand Cherokee

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AC cycles compressor on and off at about 6 or7 second intervals. no cold air and only blows from defrost . cruse control inop.

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Chech AC for the gas and pressure (check AC pressure switch)Refill if needed.

Posted on Sep 11, 2009

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1 Answer

Why does My thermostat Not switch between ac,heat,defrost . there's cold air coming out of vents but not cold enough to be ac. Initially when this started the ac was blowing hot air


If the air flow cannot be controlled from vent/defrost/floor you may have a blend door issue. This is an electric motor that operates a door in the heating system to control airflow. There are usually 3 motors controlling airflow direction,heat and recirculation. The Ac not blowing cold may also be another problem. If the AC is operational, the compressor will be engaged and the Ac low pressure line under the hood will bw cold. If this is all ok then a blend door issue should be suspected

May 09, 2015 | 2006 Jeep Grand Cherokee

3 Answers

Why does my ac compressor come on when I turn my heat on?


If the defroster is on it will use the air conditioner to pull moisture out of the air before it blows it back on your glass. Prevents condensation. Try turning your heat to just floor or front vents and it see if it still kicks on.

Feb 27, 2015 | AC Cars & Trucks

1 Answer

My 2007 grand marqis only blows hot air from the defroster vents. will not blow any cold air. Need help before spending a lot of money taking out the dash.


If you have electronic automatic temperature control, press and hold off and floor buttons at the same time, with key in the on position, then release and press auto for 1 second.this will put system into self test. If numbers come up,152-52-32- 132-or some code, Google it..most likely the blend door actuator,some have found a way to do it without removing dash at s much lower cost.

Mar 29, 2014 | 2007 Mercury Grand Marquis GS Sedan

1 Answer

Hyundai air conditioner always on


The AC will come on when the DEFROST is on.

The AC Compressor has a Clutch on the front. You can see if it is engaged or disengaged

Apr 10, 2013 | 2006 Hyundai Azera

1 Answer

AC controls stopped working


The rear defrost is an electric switch for the defroster in the rear glass.
If you turn on the ac and do not get cold air, the first thing to check is if the compressor is running. If not, you could be low on freon or have an electrical problem in the circuit for the ac clutch.
If the compressor is running and one of the ac lines is ice cold, you could have a blend door problem under the dash.

Sep 21, 2012 | 2006 Nissan Pathfinder

1 Answer

1999 f-150 defrost only ac compreesor inop


99 ford f-150 no power to compressor and all fuses good. System has pressure and clutch is free. ??

May 18, 2012 | Ford F-150 Cars & Trucks

1 Answer

A/C air sometimes cold, sometimes not on VW Beetle 2001 Turbo


AC will not work with temps are cold even when it is turned on. The air is colder cause the temp is colder. The AC cycles in hot weather because the AC charge is low and needs recharging. You will know this if you open the hood run the AC and you will hear the clicking sound of the AC compressor magnetic clutch. You can recharge it easily buy buying a compatible can of refrigerant. I suggest buying the kit with the gage so you don't overcharge the system which will cause freeze ups

Jul 03, 2009 | 2001 Volkswagen Beetle

1 Answer

Jeep AC blows cold air at defrost and feet but not through vents


There is a flap that directs the air. the flap is controlled by a vacuum actuator. This is located inside the venting. The actuator is connected to little vacuum hoses that attach to the temperature control switch. Either the flap is stuck, or the actuator has gone bad.

Jul 01, 2009 | 1999 Jeep Grand Cherokee

1 Answer

Hot air comes out of defrost vent at top dash and cold air out of


Hey, what setting is your A/C on Max AC? AC? Cycling air in vehicle or taking it from outside

The car icon on the right in this image is what I'm referring to when I say cycling air in vehicle.

373a147.jpg
Also, do you ever have cold air blowing? on any setting or any speed? if not, find your A/C fan, it is smaller the the engine cooling fan, sometimes there are 2 fans together. The AC fan should be located at the front of the vehicle and is usually electrically powered.

Also try to find your compressor, looks something like this:
730c4b9.jpg

is it running? is one pipe hot and one cold? (the pipes I am referring to are inlet and outlet pipes of the A/C compressor unit.)

Hope this helps, keep me posted

May 10, 2009 | 1994 Mercedes-Benz E-Class

1 Answer

No heat - ac stays on blowing through defrost vents


If you have the heater directed to the windshield, the AC will turn on. Move the control away from defrost.

Feb 01, 2009 | 1998 Ford Windstar

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