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Topic: Dash AC not working on 2002 E-450 LD. (Read 272 times) previous topic - next topic
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Dash AC not working on 2002 E-450 LD.
I've seen a couple of post from other members regarding their dash ACs not working. I failed to see how to resolve it.
Your suggestions would be much appreciated.

Thanks in advance.
Mark
2002 30' IB
Re: Dash AC not working on 2002 E-450 LD.
Reply #1 –
The classic symptom you may had read about is vents stop blowing under acceleration.  

The LazyDaze Companion has a nice entry on this issue that may soon be available.   Until then, try this: The Lazy Daze Companion: air conditioner

If that's the issue, you have a vacuum leak that you need to route around.  

This video demonstrates a new canister in the engine compartment, while I think some here have placed the canister in the cab.  

https://www.youtube.com/watch?v=qmSOS-yYZQI&ab_channel=TheLimoGarage

Rich
2003 MB
Re: Dash AC not working on 2002 E-450 LD.
Reply #2 –
Hi Mark;  If the cold air comes out of the defrost vents, then the vacuum to operate the vent flap control isn't getting there.  It could be the flap control valve, but more likely it is a small diameter vacuum hose, it looks like a wire. It is exposed to rat damage under the hood, near the front passenger side wheel well. In my case it was a squirrel.
   This link goes to where and how I fixed it. I relocated the tank and valve to where I could reach it again easier if needed.  Furnace     RonB
RonB (Bostick) living in San Diego
Original owner of "Bluebelle" a '99 TKB
 
Re: Dash AC not working on 2002 E-450 LD.
Reply #3 –
I second Ron and Rich. In my case rats got vacuum lines under the access plate in the middle of the dash (photo 1). They also got me behind the firewall which is very common with Fords. As many others have done I bypassed the factory switch and installed a new switch and canister next inside next to the doghouse (photo 2). Several posts here on this issue and also a number of youtubes which I found very helpful. Good luck.
jor
09 27' MB
10  Suby Forester