I just refiled my a/c system but my problem is that the aux fans are not runing when i turn on the a/c system they just turn on when the temp reaches 110C.

You will have to have a wiring diagram as every year is different almost. There are probably two relays for low and hi speed. One common problem is the resistor used in the low blow condition which is the one you are missing.

Pretty easy to check. Pull the wires from the pressure switch on the drier and put them together, this will turn the fan on. If it isn't running check the resistor (big ceramic looks like ignition ballast resistor) with a test light. If it lights one side and not the other the resistor is bad. If neither side is hot then the relay or fuse must be checked.

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Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician

i checked the resistor and only got power on one side so i guess that was my problem. thanx