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Posted on May 02, 2009
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Ford Thunderbird 1994 A/C compressor

If the vehicle is jolting when the a/c system is turned on, does that imply that the compressor may have seized up, or are there other possible reasons?

  • timmyfinn21 May 04, 2009

    I did just have the motor mounts replaced a couple months ago. I'm wondering if that had any effect on the a/c now. I haven't had to use it in the winter, up til now. Would you know if it could ruin the serpentine belt if I allowed it to run with the resistance it sounds like its making, just to see if the a/c can work? It sounds like a buzzing tone, or a type of friction. It also made the same sound when I tried to use the Heat. If it is the case of the motor mount, what would be the next step to take?

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  • Master 1,959 Answers
  • Posted on May 02, 2009
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Not necessarily. The fact that the vehicle is jolting when the a/c compressor is turned on could be to the fact that the engine is designed to rev higher when the a/c is on. If the a/c works, then the compressor is working and it hasn't seized. If this is the case, you may have a bad motor mount. This is more likely if you feel the motor lurch when you jump on the gas pedal. Hope this clarifies your problem and Good Luck!

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