Question about 1994 Jeep Grand Cherokee

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My daughter's 1994 jeep grand cherokee a/c system blows ice cold air but the fan just doesn't seem to blow hard enough. i have seen a bunch of stuff about the resistor module issues. is this my issue as well? it has multiple speeds but just doesn't seem to have a high gear. any ideas?

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: Heater blows cold air when idle

Sounds like you may have a partially plugged heater core. You could flush this out separately, from flushing radiator & engine block. Diconnect heater hoses going to your heater core and clamp off, so not to loose coolant from engine. Now hook up separate hose to one side of heater core pipe and flush out with typical garden hose. Repeat procedure on both heater core inlets. Reconnect original heater hoses and test difference. You may have to add an additional litre of antifreeze. If this don't work i suggest changing heater core. Good luck.........Ron.

Posted on Jan 03, 2009

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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

inhisname
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SOURCE: Heat/AC Blower fan speed only works on High

hello, this sounds like a bad blower motor resistor!! its cheap and easy to change..if you need more info on locations let me know,, good luck.....marty

Posted on May 27, 2009

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SOURCE: 2005 Jeep Grand Cherokee Air Conditioning Issue

You will need to recharge your system , go to the nearest parts store and buy what ever brand that is recomended, and attach it to the lower air conditioning recharge valve.

Posted on Sep 12, 2009

  • 21 Answers

SOURCE: Heater

your blend doors are broken a common problem for the jeeps 1999-2004 e mail me at mrenc@msn.com and i will send you a link to a web site for a repair kit that will cost les than the 1200-1500 a dealer will charge to fix this

Posted on Dec 02, 2009

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1 Answer

Air conditioning on 2002Jeep Grand Cherokee does blow cold enough Added charge to low suction line but still blows the same also the same line seems to have moisture where the aluminum and rubber meet


To much refrigerant will be the same as to little ! You should take it to a certified technician you knows what he's doing ! Technicians such as myself have to be certified to fix A/C system , they should not sell refrigerant to the public ! Did you change the orifice tube or the THX valve , which ever it has ! Sounds like it's plugged !

May 29, 2015 | 2002 Jeep Grand Cherokee

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Air only blows from the dash vents and will not change to the defrost or floor, and I have no heat - only cold air. Air conditioning seems to work. 1994 jeep grand cherokee v8 with climate control.


the damper or flapper ibside the heater box is not moving. If they are vaccum actuated could be lack of vaccum or bad diafram in the actuator...replace

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Grand cherokee heater blows cold air


Check the coolant level, sounds like you may be slightly low....Be sure heater is on high when filling the system....Look for any air bleeds...

Dec 06, 2009 | 2003 Jeep Grand Cherokee

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Why would my 2002 Jeep Grand Cherokee only blow luke-warm to cold air when the fan is on high? First the heat went on the highest setting, so i used the second highest. Then it started to coll as...


Sounds like you need a blower motor resistor located down under dash on pass side next to blower motor. This is a comon problem and I have changed many of them. thats just the fan speed problem. Ive seen the blend doors break easily on those jeeps. thats inside the heaer core box and moves the flap from hot air to cold air. If it is stuck halfway -or mostly to cold- you may only get luke warm air. If they had the heater core out-maybe they possibly broke it.

Dec 04, 2009 | 2002 Jeep Grand Cherokee

1 Answer

The air conditioning in my 2005 jeep grand cherokee is blowing, but it is not as cold as it should be. I have it on high and it is not cold.  The air is cool, but not cold.  


You may have a leak in your freon. If you loose pressure in the system, it stops cooling, Have a pressure test done.

One other thing you can check is the fan. If you have the 4.7 your fan is electric. IF it does not come on when you turn on your A/C you may not be getting enough air through the condenser. Start the jeep with the air on and the hood open. See if the fan is on. (do this when the vehicle is cold, so you can tell if it is commanding the fan on because of the A/C not because of the temp of the motor.

Hope this helps.

Aug 17, 2009 | 2005 Jeep Grand Cherokee

1 Answer

A/C blows warm air


Have your a/c tech look at the pressures at an idle. It sounds like the condensing coil does'nt have enough airflow or the compressor is week. Another possible problem could be that the temp control door is'nt operating properly. Hope this helps. Good luck.

Jun 11, 2009 | 2003 Jeep Grand Cherokee

1 Answer

2005 jeep grand Cherokee ac blows cold only on drivers side. Other side blows out warm air. THANKS Vic


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.

Mar 12, 2009 | 2005 Jeep Grand Cherokee

1 Answer

96 Jeep Grand Cherokee will not blow out hot air


It's possible you are not getting enough coolant flow to your heater core. Try pulling the hoses off the core, blowing it out with air compressor, fill with water and blow out again. Try this about five times and see what happens. Alot of times these cores will plug up or have restricted flow. They will blow warm at low speed but it won't flow enough hot coolant through to stay hot on high blower speed.

Feb 09, 2009 | 1997 Jeep Grand Cherokee

3 Answers

Heater


your blend doors are broken a common problem for the jeeps 1999-2004 e mail me at mrenc@msn.com and i will send you a link to a web site for a repair kit that will cost les than the 1200-1500 a dealer will charge to fix this

Nov 12, 2008 | 2000 Jeep Grand Cherokee

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