I've got a 98 Mustang GT. Only actual "mod" is a Steeda Tri-Ax shifter. The problem is when I have my A/C on OR nothing on the car will overheat after it's been warmed up & from that point driven for about 20 minutes. If I turn the heater on then the car stops overheating. I pulled her over & popped the hood.. the fan isn't coming on at all when A/C is on or nothing is on.. but it does come on when heater is on. I replaced the coolant temperature sending unit & this did not fix it. I'm thinking the CCRM might be the issue? Anybody else have any ideas as to what it could be? Thanks a bunch in advance.
-Mike