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Ac/heat

(1999 Ford Taurus)
in Temperance, MI on March 06, 2011
Help please, 1999 taurus wagon, high miles, no other problems, like the car, had since new.
a/c works fine, engine never overheats, sometimes when a/c is on engine overheats, shut off a/c engine cools off, 5 minutes later turn on a/c all works fine. Last trip I drove 250 miles with a/c on working fine, stopped for gas and when resuming trip, no a/c and engine overheats. Drive to rest area, turn off car, wait ten minutes, continue trip and all perfect. Took to Ford dealer, they replaced thermostat, (broke bolts by the way, $500.00) drove 20 miles and same problem. They say I'm nuts, it works fine for them. I'm beginning to think they are right. Any suggestions
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Popular Answer
on March 06, 2011
I'm concerned about the operation of your cooling fan. The electric cooling fan motor that kicks in when termpatures get too high could be in question.
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on March 07, 2011
thank you for response, Dave
As far as I can tell the fan is working, observed it working while troubleshooting this before it went to the dealer, seems they would look at that also when replacing the thermostat, but you never know. Could the fan be working only intermittingly?. This is real frustrating stuff, works just great then suddenly, hot air and high temps. Seem's to happen when I shut off car then restart, and when it happens, shut off and restart will fix it. Hoping for any suggestion. Thanks again
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