2002 E450 A/C Vacuum Loss
As in title, 2002 E450 under Class C. A/C blows out of Defrost Vents Only. Vehicles are set up to use the Defrost Vents IF Vacuum or the Mode Selector fails. I've found I have vacuum where the l...
Forum Discussion
Ford put the Vacuum Check Valve and Vacuum Reserve Canister IN the HVAC Cabinet! Convenient exotic engineering but awful servicing. Going TO the controls with vacuum, the vents worked. Going from engine source to and from the HVAC cabinet showed only LEAK. Ran a hose from engine source to controls and it all works. Now I need a replacement Check Valve, Reserve Canister, and space to install the Canister. The hard work of diagnosis and hose routing are done. I can reassemble most of what I tore apart, and install the Canister and Valve at either end of the bypass hose. This is gonna work out.
