Edmunds Answers

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  • avatar MrShift@Edmunds 07/19/13 12:10 pm PST

    Well the idea that contaminants might have plugged up the expansion valve is not an unwarranted suspicion.


    you'd still need to determine if the compressor is engaging or not during times of "hot air". This is a very important part of the diagnosis.

Answers

  • MrShift@Edmunds 07/18/13 5:38 pm PST

    So you're saying that it blows cold while you're moving but blows hot as soon as you come to a stop at idle?


    (You may reply to this thread by clicking on "answer this question" below)

  • jimbyr 07/18/13 8:11 pm PST

    The warm air, instead of cold air, typically blows when the car in not moving, for example, at a traffic light. However, there are times when the cold turns warm while the car in moving. Unpredictable is the only predicition to be made in trying to get a pattern. Sometimes the warm air only lasts 2 minutes and sometimes it does not go to cold until the car is moving again. Thanks for any insight you can provide. Jim

  • MrShift@Edmunds 07/18/13 8:25 pm PST

    A number of possibilities come to mind but the most obvious is that the refrigerant level is not at optimal level; could also be a vacuum leak causing a diverter flap to open and close; could be a defective magnetic clutch in the compressor.


    I suggest that as soon as the car starts to blow warm that you check to see that the compressor's clutch is in fact engaged.

  • jimbyr 07/19/13 8:50 am PST

    Thanks for the suggestions.

    The dealer that replaced the a/c compressor used an aftermarket compressor. I had to have it insltalled in WVA while in rouite from Ohio to jMaryland on vacation.

    I took it to a MD dealer and they were the ones who informed me it was an aftermarket compresor, and as such they had no serial number to detemine if the clutch relay had been repleced with the compressor. The relay did not look new so they replaced it. That did not solve the problem.

    While still on vacation I took it to another dealer in VA who suggested checking for metal particulates. I agreed, but they were unsucesssful in removing the screw that secures the desicant bag.

    Jim


  • MrShift@Edmunds 07/19/13 12:10 pm PST

    Well the idea that contaminants might have plugged up the expansion valve is not an unwarranted suspicion.


    you'd still need to determine if the compressor is engaging or not during times of "hot air". This is a very important part of the diagnosis.

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