Question about 1999 Mercury Sable

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A/C not working . If you disconnect the battery, and then reconnect the battery it will work for a few hours

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If you have a digital readout on the temperature and it is an automatic climate control unit, the unit in the dash is acting up. There is a selftest which is different between manufactuers and year models and only a dealer would have enough books to have this info.
Since your air seems to recover by "rebooting" the system, the only part in the A/C that has a computer is the control "head" in the dash. The pressure switches and basic hard components would not respond that way. You can get a used one from a Salvage yard for a lot less than a new one. Let someone do a diagnostic to verify.

Posted on Sep 24, 2009

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Posted on Jan 02, 2017

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