Question about Jeep Grand Cherokee

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The air conditioner is working quite well, but when I accelerate, the cool air comer out from the top of the dashboard openings instead of the air conditioner openings. How can I fix this problem??

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  • Anonymous Feb 02, 2009

    i have the same problem . i sent my care to dealer and they advised me to keep it for 2 days to open the dash board and solve the problem .

    the suspect the vacuum system .

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1-it sound like you have a vacuum hose off, are a hole in the hose, causing it to lose vacuum making the dapner open toward the defroster vent. Are you could have leaves & trash in your duct box, not letting to open all the way open. Thrusting the air back up top???

Posted on Jan 30, 2009

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  • Jeep Master
  • 6,982 Answers

Engine vacuum drops when accelerating either you have a leaking blend door motor or a vacuum leak in the system that is lowering working vacuum to the a/c control. Listen under the dash for any vacuum leaks and inspect vacuum lines in engine compartment.

Posted on Jan 30, 2009

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How to replace a 1999 toyota camry 4 cylinder heater core


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    • 2Disconnect air conditioner suction hose and liquid pipe, then clamp on the tubes with an SST clamp. (Make sure you don't deform the tube). Disconnect the heater core hoses.

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1 Answer

Air conditioner will not turn on but defrost comes on with hot air and can not be turned off.


Sounds like your blend door may be stuck or you could have a vacuum leak. If you're not comfortable working on it, take it to a reputable shop.

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Vacuum leak on 95 buick riviera, I have several problems related to vacuum leaks. First is cruise control quit working recently, second windshield washers not working and third air conditioner seems to...


May have to check out if the vacuum motors have the vacuum tubes attached but this may take a lot of work to disassemble the heating ventilation air conditioning out of the dash and underneath the dashboard. If rain enters the compartment under the dashboard, the pan that is designed to catch water may be disturbed or cracked somehow. Try to check fuses for a/c and the heating, the cruise control, and windshield wipers to see if there is an obvious electrical issue there. The vacuum leak is not related to the windshield wiper motor not working.

Good luck on this repair.

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Air conditioner quit working after changing battery?


i had the same problem,to me it was the ac/heat door actuator,this turns a motor for the temperature contol, when its broken it ither stays at just one temperature or flips from hot to cold constantly , if it is this is its not a cheap fix. if you go to the dealer just the actuator costs you about $200 and labor is $800 they will tell you that they need to take the whole dashboard out and thats why it will take 8 hours. what i did was get one from the junkyard for $50 and install it myself,all you have to do is open the glove box and take out a 3-4 screwd weird shaped box (actuator) its a tight space but it posible to take out with out pulling the dash,it saves you $800. it took me about half an hour to change it.

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I have a 2007 Kia Sorento EX. I had a similar problem. I checked for leakage in the nozzle. The nozzle was repaired and I refilled gas. This resolved the cooling problem.

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2 Answers

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Three possibilities;
All related to blown fuses,

1- Fuse blown in the engine compartment LH.
2- Fuse blown in the cabin forward LH below the dashboard (below your legs left hand).
3- Fuse blown in the harness (wire bundles) below the dashboard very easy to reach with your hands “just look underneath steering wheel ".

U said " The air conditioner blows, but the air is not cold.
" Yes only the fan working which might receiving power independent all from those other mentioned things.
If all fuses OK. Then look for broken wires.

Regards;
MAR

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Hello..

Sounds like your A/C compressor is not cycling off with the pressure cycling switch. The reason the system gets cold on hard acceleration is because your car is equipped with a wide open throttle A/C cutoff relay which turns off the compressor to reduce the load the compressor takes away from the engine.

Try to replace the pressure cycling switch that is located on the AC accumulator. (the black canister close to the passenger side firewall)...The switch can be replaced by unscrewing from the accumulator without refrigerant loss because a schrader (tire type) valve will stop refrigerant from leaking out. Hope this helps...

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