i have a stock 99 ex civic. when i first start the car and turn on the a/c the clutch engages with no problem and blow really cold. after about 10-15 mins of driving the clutch doesn't kick on and a/c stops working. i hooked up a gauge to the lies and when the a/c is working pressure reads 40-50 psi as it should. i tried take off the clutch and cleaning it but problem still persist. any idea what it could be? i checked the fuses in the car and relay under the hood. some old dude told me the a/c clutch was overheating...are there any other ac relays on ek's? should i change out the clutch? help! Texas is F-in hot!