Question about 1994 Jeep Cherokee Country

2 Answers

Compressor is running, and clutch is functioning. Vacuumed system and Added about 1.5 cans of 134r coolant to system after adding conversion fitting to port near sight glass below compressor. STILL no

Compressor is turning, vacuumed entire sys and added 1.5 12oz cans of R134a to system via valve near glass sight port, still not cold.

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  • Shaun Templet May 08, 2009

    I think the problem may be that the can's that I used were 10oz. refrigerant and 2 oz. of oil. another person said that was way too much oil. the pressure switch test was good. the evap. isn't that cold and no frost anywhere. Should I re-vac sys and then use cans with just refrigerant?

  • Shaun Templet May 08, 2009

    do you know where I can find the recommended amount of oil? is there a way to check the dryer and orifices? How can I clean the system? It got cool, but no where near cold.

  • Shaun Templet May 08, 2009

    I'll give it a shot tomorrow and let you know.

  • Shaun Templet Jun 29, 2009

    So since the last post someone recommended I change the expansion valve. I bought one and while attempting to change it I broke the line going into the firewall to the evaporator. Yesterday I changed the evaporator and expansion valve. When I try to service with R134a the guage jumps to 100 psi with the compressor running. STILL NOT GETTING COLD!

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  • Jeep Master
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I need to ask some qyestions to help u here, was this a coversion from R12 to R134?
once the bubbles were gone in the site glass did the system even begin to get cold?
What is the low and high side pressure readings? this is VERY IMPORTNT TO KNOW. the readings should be around 28-34 PSI on the low side and around 150-175 PSI on the high side, do u have anything close to these readings on the high and low sides? Also go to the links below for help
http://www.aa1car.com/carleyware/retrofit.htm

http://www.aa1car.com/library/ac98.htm

Posted on Jun 29, 2009

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  • Master
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Yes you should add the recommended amount of oil - but are you sure the compressor or dryer is working properly?
Even with that much oil - it should still get somewhat cool.
Instead of vacuuming - you should clean the entire system.
If you dont have the equipment - you need it done at a garage. Too much oil can saturate the dryer, and plug the orifices.
Evacuating and refilling may just be wasting your time and $$ on refrigerant.

Thanks for using FixYa.

Posted on May 08, 2009

  • blueextc3221
    blueextc3221 May 08, 2009

    There is an A/C cleaning product - basically highly evaporative electronic degreaser... it is flushed through the system and vacuumed out... then pure air is forced through... then add the oil, and charge with refrigerant.

    And im sorry i misread your original post... for some reason i thought u typed 20 OZ!!

    Sorry.

    Most cars take 6-8oz!!

    So you actually should add MORE :D

    try it out. add about 4 more Oz.

  • blueextc3221
    blueextc3221 May 08, 2009

    in the meantime - ill try and find the exact amount. Sometimes it is on a sticker on the radiator support or hood.

    5-6 should get you pretty cold if everything else is working properly.

    SOME LIGHT READING in the meantime :D

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