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Temperature guage rises to 3/4 when A/C on

posted by  850t5 on  Wed Aug 6 10:30 CST 2003
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last visit: Wed Nov 7 00:08 CST 2001
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Does anyone experience this? I've notice whenever I have my A/C on, the temperature guage will went up from 1/2 to 3/4. This happens for the last month or so after an A/C recharge. I'm located in Vancouver, BC and I don't know if it's because of the esp. hot summer days we have here for this year.








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    Temperature guage rises to 3/4 when A/C on

    posted by  Gerald C on  Wed Aug 6 13:47 CST 2003
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    This is not normal behavior. In virtually any temperature condition, the indicated temperature should remain at "1/2". Check: (1) thermostat, (2) radiator fan operation when A/C is engaged.








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      Temperature guage rises to 3/4 when A/C on

      posted by  850t5 on  Thu Aug 7 13:32 CST 2003
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      last visit: Wed Nov 7 00:08 CST 2001
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      How do I check if any of the two are working properly.
      (1) thermostat,
      (2) radiator fan operation when A/C is engaged?








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        Temperature guage rises to 3/4 when A/C on

        posted by  Gerald C on  Fri Aug 8 08:41 CST 2003
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        First, if your 850 has over 60,000 miles and you have not yet had to replace the thermostat, it is highly suspect. Almost all of them fail, mostly in the open position (so the engine stays too cool in the winter). Sounds like yours may have a closed-failure.

        The radiator fan is normally thermostatically controlled, but it should *always* come on when the A/C is on. Try observing this when your car is first started and cold. The fan will probably be off initially, but should come on when the A/C is activated.







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