When I switch the heating/cooling fan switch is sometimes works, and sometime it doesn't. If I shut the car off and try again, the fan switch sometimes works. If thats the case after stopping and restarting alittle bit later on, the switch works.
Could it be a faulty relay of some sort?? I figure that if the fuse had blown, the system would not work at all. That had happened to my '89 420SEL. It stopped working altogether. I checked the fuses and found a broken porcelin fuse in the box.
I haven't checked the fuse box yet because of the off/on status of the HVAC. Any suggestions would be helpful.
Thanks in advance.