Question about 1996 Jeep Grand Cherokee

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A/C on 1996 Jeep Grand Cherokee is not very cold

The A/C on my 1996 Jeep Grand Cherokee is not very cold. yet the return hose is very cold and there is no freon leak (freon pressure is normal). I suspect the evaporator is dirty and there may be air leaks going around it. Is it possible to check/clean it without removing the dashboard?

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  • toneman2121
    toneman2121 May 28, 2010

    if the pressure is normal there are no leaks. what is the pessure? if the line is very cold, it seems the a/c is working. maybe the temperature control door is stuck in the heat position.

  • didier9 May 28, 2010

    I used a cheap pressure meter bought at AutoZone, and it said the pressure was normal (remained in the blue). I took the car to the A/C mechanic, and using his equipment, he said it was low on freon and he put some more. The A/C feels colder now, but not nearly as cold as I would expect, certainly not as cold as my other car (an Acura). The technician also suspected the blend doors, but running through all the settings, he said it seems to work.
    I saw on another site that there is foam in the evaporator box that becomes brittle and loose and clogs everything. Unfortunately, any work on the evaporator box requires to remove the dash and purge the system, so that's out of the question for a home repair. The dash does not scare me, at least once I receive the service manual, but the freon is another story. The shop quoted around $800 to replace the evaporator. Since that's what I paid for the car, I am reluctant to have it done quite yet, even though it started being very hot here (Florida)

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The refrigerant can be recoverd by the shop. discuss the cost with them and explain that you're going to do work yourself. and would like them to recover it, and once repairs are done, evacuate and charge the system. however, once the system is empty, i would replace the accumulator and orifice tube, or the receiver/dryer and expansion valve. which ever your car has. pag oil should also be added to the system. 2-4 oz should do. this can be done when re-charging.

do not rule out the blend door

Posted on May 29, 2010

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