A/C
#2
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Is the engine cooling fan on when the A/C is running. It should be. The A/C requires air to go through the coils to cool the R-134. As you drive the air would go through the coils. If the fan is not running then wouldn't work when the car is sitting. The fan should always run when the A/C is on so check it and if that is the prob. Then the fan or fan thermo is not functioning.