Ac issues

[dutchie01]

2001 ds dp ducted air.

So a year ago I had the rear ac replaced because it wasn't cooling very well, about 3 months ago had the front replaced. Now with the front ac on high set at 70 it runs for 20-30 min then air flow slows way down and makes strange noise. So I take it to local Newmar dealer and they claim the thermostat is bad so they replace it and claim all is well. But yesterday it did the same thing :( any ideas??

[footdoc]

Bad fan motor???

[teejay]

sounds like blower motor, blower switch or blower resistor. If its an Evans unit Evans Tempcon - Johnny's AC Parts Warehouse check out for the parts

[dutchie01]

It's brand new!!! Blower blows fine when it works. At the moment is blowing high but not cold :(

["007"]

Maybe bad thermostat or control in first AC check out trouble section of this link to track down problem.
There is also added information on gaskets proper install on bottom of AC unit to direct air into the duct ceiling system for Newmar found in Quick Tips 1 & 2..

[EngineerMike]

Have your tech check the start & start-run capacitors in the AC. Easily replaceable, any good AC tech should have those on the truck or available w/in 24 hrs from their local supplier. A bad capacitor will leave the motor w/no power even tho the motor may spin, or will allow motor to spin down to near zero. If its an intermittent internal short in the capacitor, would explain the symptom.