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Originally Posted by SilverTransAm
turning on the AC activates the second fan.
check your water pump...
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In his case, since it's a TBI car, turning on the AC energizes the only fan. If your car got to 260 without the fan turning on, there is something wrong with the primary switch. There's lots of tech info on the fans over at
www.thirdgen.org if you've never checked it out. Turning on the AC just bypasses the primary switch, so it can draw air across the condensor and keep the compressor cool.
Anyway, you should check a few other things out. If the waterpump is new, you could have a bad thermostat or clogged radiator. How old is the radiator?