AC Vacuum Motor Replacement

[Tom Rowan]

I have been struggling with the cab air conditioning not coming through the vent on my 2015 Precept 31UL. It comes through the defrost and I can switch it to come through the floor but not the vents.

I have determined the problem to be the vacuum motor controlling the ac vents. Has anyone replaced this motor that can give some advice on doing so? The plenum box appears to be sealed and not accessible. Also Camping World charged me over $500 for this motor, does that sound right? It doesn’t to me but I can’t find it on line to confirm it.

Thanks for all your help.

[Tom Rowan]

The actual replacement was fairly easy. Once you remove the enormous dashboard, there are 4 rivets holding the top of the plenum on. I drilled those out and the replacement was 2 nuts holding the motor in and. Nut and bolt attaching the motor to the vent flap. Then reattach the top with rivets and reinstall the enormous dashboard! Good news is that it is fixed!