Contour Enthusiasts Group Archives Forums General Troubleshooting A/C Clutch

My A/C did exactly the same thing.

When I switch on the A/C from inside the car,
the clutch is never engaged in.

Finally I found that R4( the relay for
the clutch ) never gets a '+' signal from
the ECU(computer module).

What may cause this? The dealer has replaced
the heater blower switch and its resistor
under recall.

Thanks!