Question about Buick Park Avenue

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Clutch does not engage when a/c is turned on, tried to troubleshoot but, to no avail.Unit was retro fitted and converted to r134 coolant. would appreciate any suggestions you might have thanks a bunch

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  • jhellier Jul 01, 2009

    I am thinking that it will answer my question. I will try these solutions and get back to you as to the outcome. Thanks a lot, John Hellier

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First check that there is voltage going to the clutch solenoid, if not clutch is bad. (warning: do not apply voltage to it while it is connected, you will damage some electronic circuits.) Next, check the continuity of the coolant pressure switches. Make sure they have voltage on both terminals while the ac is operating. If there is no voltage on both of them, then you have a faulty ac control module.

Posted on Jul 01, 2009

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91 Mercedes 300 E has R12 ac system that is no longer blowing cold. A faint bit of cool air sometimes shows up but it can hardly be called cool. Is there any additive out there compatible with R12?


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