1993 Pontiac Sunbird A/C only on HWY, Car runs hot at idle

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Engine Cooling problem
1993 Pontiac Sunbird 6 cyl Front Wheel Drive Automatic 129000 miles

A/C does not blow cold when you are stopped at a light, but is cold when you are at a constant speed. When the car sits at a light with the A/C on, the car makes a sound like it is "clicking" off and on, it does this whether the A/C is on or the heat is on. I have replaced the thermostat, the engine coolant temperature sensor and gauge sensor, and have taken the fan out and hot wired it to the battery, the fan works. I have also replaced the elec fan relay. Thank you for your Help!

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Thursday, September 11th, 2008 AT 5:34 PM

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