We bought a 2003 Fleetwood Southwind in April and took it from New Jersey to Florida and experienced the fan clutch cycling when the AC was on and going uphill. It was extremely noisy and never owning a motorhome before I thought this was normal. When we returned home I had it look at and of course the noise couldn't be duplicated here because we're so flat here. We went to the west coast and back in July, 2011 and the temps were in the 90's and up so the fan clutch was constantly running or should I say screaming. When it came on it sounded like a jet taking off.
There was no way I was going to put up with this so I bit the bullet and had the fan clutch replaced. I also bought a sound/heat dampening material and placed it around the engine. We went back to Florida in October and needed the AC and when the fan clutch came on I could barely hear it. I opened the window just to see if the sound dampening material was just keeping the sound out, but I couldn't hear it.
Replacing the fan clutch did the trick for us and that was a shot in the dark since there was no definitive proof that it wasn't working properly.
I hope this helps anyone that is experiencing the loud fan clutch noise.
