turn on AC coolant temp light comes on on 1990 Cadillac DeVille

...when turn AC off the light turns off....its a 87 cadillac deville...

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1 answer 2 comments
when you turn a/c on how long b4 the coolant temp light comes on?
..about ten minutes
have you ck'd your coolant level. maybe the car is starting to overheat or the a/c cooling fan is not working properly