chris123
Well-known member
My mechanic just recharged the A/C on my 1986 (C60 manual), and when he turns the A/C on, the fan will not come on as it should. It functions properly in regards to the coolant temperature, on at 225* and off at (not sure of exact temperature); he said he grounded the wire on one of the pressure switches, (simulating the head pressure signal going back to the ECM), and the fan still won't come on when the A/C is on; the A/C will only stay on for a minute or so until the high pressure switch reaches the high pressure limit, then the compressor will shut off as designed; is there an open wire we should be looking for? Could it be a bad ECM? Again, the cooling fan will come on as designed without the A/C being on when the coolant temperature reaches the pre-determined point, so we're a little stumped. Any thoughts?
Thanks in advance, Chris
Thanks in advance, Chris