AC and cab fan in-op... help please

[Camper Ken]

Motohome has been sitting in the driveway and not driven since last October. Yesterday I washed it and went for a short drive. The AC and cab fan is not working. Any advice is appreciated.

[craigd853]

Hello, the easiest thing to check first is your fuses. When you say the cab fan what do you mean? The blower motor for the a/c? Need more information, did it work when you pu it away, is there power going to the a/c compressor? Normally when the a/c comporessor stops this has no affect on the blower motor. Might suspect a relay if this indeed the case. Good Luck

[Camper Ken]

Originally Posted by craigd853

Hello, the easiest thing to check first is your fuses. When you say the cab fan what do you mean? The blower motor for the a/c? Need more information, did it work when you pu it away, is there power going to the a/c compressor? Normally when the a/c comporessor stops this has no affect on the blower motor. Might suspect a relay if this indeed the case. Good Luck

- Yes I'm refering to the blower motor for the a/c.
- I believe it was working the last time I drove it a few months ago. I think I would have noticed it wasn't if that was the case.
- I don't know if there is power going to the a/c compressor, don't know how I would check that, other than when I press the AC button on the dash I hear no sound like its engaging.
- I need to get out the manual to determine the location of related fuses since there is no labeling of fuses on any of the fuse boxes.

I have an appointment at my MB dealer next week if I can't figure out anything on it.
Thanks for your advice.

[Paul_D]

https://www.startmycar.com/us/merced...o/fusebox/2015

Fuse 37 or 41

[Camper Ken]

OP here with update...
Thanks for all the advice, but still had to take it to the dealer. A simple blown fuse was not the problem. It's was an expensive fix which I expected from a MB dealer. At least my local dealer works on motorhomes on Sprinter chassis.


Blower motor & regulator432.00 labor
258.00 motor
197.00 regulator
___________
887.00 total


Drive belts (recommended due to age of motorhome - 10 years)
600.00 labor
138.60 belt

61.60 belt
___________
800.20

[Paul_D]

I'm kinda surprised at the belt labor charge. I know the serpentine belt swap is about 20 minutes with the right tools and a little experience. Haven't tried the other belt.

[Camper Ken]

Originally Posted by Paul_D

I'm kinda surprised at the belt labor charge. I know the serpentine belt swap is about 20 minutes with the right tools and a little experience. Haven't tried the other belt.

I was a bit taken aback when the service advisor mentioned the labor cost. He said something about the grill, fan, air box had to be removed. I thought the labor charge was somewhat high. I've since watched a couple of YouTube videos, one makes it look like a 20 minute job, while another shows dismantling a number of under hood items.