Dash air

[Donald]

My dash air only blows out the defrost. No matter where I put the selector. It is electrical controlled not vacuum.

[Donald]

My dash air only blows out the defrost. No matter where I put the selector. It is electrical controlled not vacuum.

[Kazoo Tom]

The electrical switch itself may have gone bad. Check the switch to make sure that all the wires are still connected and tight. Check and double check the ground wire for a secure connection. You motorhome manufacturer can probably supply the name of the switch supplier if you need to replace it.

[RV Wizard]

Donald, what motorhome year, make, and model do you have? What chassis is it on? A lot of the damper doors are controlled by vaccum. Diesel pushers have their own little vaccum pump up front somewhere that is 12 volt powered and a line off it goes to the damper door controller.

[Donald]

I have a 2005 Gulf Stream Sunvoyger With A W/H Chassis, gasoline.

[J Stemler]

Not sure about W/H but on my Ford F53...there is a vaccum hose on the back side of the air cleaner that controls the dash vents. Mine came off during filter replacement and I had the same problem you are having...drove me nuts until my dealer pointed out the vaccum hose to me...fixed in 30 seconds

[Okrver]

Well in my case. I had a mouse get under the dash and chewed an air line. I cut and install a bridge.