Okay, this makes absolutely no sense and I've had two mechanically inclined friends of mine ride with me to verify that it is really happening and I'm not crazy. My clutch fan on my 95 4.0L, yes my clutch fan not my auxilary fan, only functions when I turn the air conditioning on. Its mechanical so it makes no sense to me. If I'm in traffic my XJ is starting to run warm when I don't have the a/c on, click on the a/c and you can totally hear the clutch fan roaring as I accelerate. If I turn off the a/c it instantaneously stops working and starts to slowly warm up but not over heat, just run at like 220-230. Its not the auxilary fan that kicks on with the a/c. That is a constant hum, this is definitely the clutch fan, it increases in sound as I accelerate and I had a mechanic friend of mine and my Dad who is extremely good with cars ride with me and we all agree that its the clutch fan. I had to make sure I wasn't crazy since it makes no sense. The only conclusion we have come to is that the extra resistance from the a/c compressor makes it engage. But why is it doing this? Its only six months old. Should I just take it back and get a new one or is there something else that can cause this. I have a new serpentine belt on there that is adjusted properly. This blows my mind and makes no sense to me. :dunno: :dunno: :dunno:
Last edited: