Over the road AC and heater driver side not working

[01ccmagna]

I have a 2001 MAGNA Haven and the over road ac and heater vents on the driver side have stopped working. The passenger side and rear bedroom work fine. I have checked the fuse and it's fine.
Has anymore experienced this program and if so, what was the problem?

[pumper9x9]

Look under the dash and trace the hoses to the vent one probably fell off. Another thing to consider is running your generator and house AC while you're going down the road. There's been a lot of discussion on this subject. Some advocate that this will save you fuel others say that it just exercises the generator. I had a rep from Cummins/Onan state that the generator at max load will only use about a gallon of fuel per hour. If you have a Silver Leaf you can pick a flat stretch of road and check it yourself with the mileage readings. Good Luck

[BFlinn181]

Originally Posted by 01ccmagna

I have a 2001 MAGNA Haven and the over road ac and heater vents on the driver side have stopped working. The passenger side and rear bedroom work fine. I have checked the fuse and it's fine.
Has anymore experienced this program and if so, what was the problem?

Most likely your dampers and diverters in the HVAC plenum are vacuum powered. A leaking or unhooked hose, or a bad vacuum 'motor' is likely the issue. If vacuum is not hooked up at all, usual practice is for all air to be diverted to defrost, so it's working a little.

[Smitty77]

Originally Posted by BFlinn181

Most likely your dampers and diverters in the HVAC plenum are vacuum powered. A leaking or unhooked hose, or a bad vacuum 'motor' is likely the issue. If vacuum is not hooked up at all, usual practice is for all air to be diverted to defrost, so it's working a little.

On the heater side of things, and I'm talking Engine/Chassis heat thru the front dash here, sometimes the hoses go bad or as mention 'valves' don't open up and allow hot fluid to circulate to the area. I've seen when inspecting used coaches, where hoses have been 'bypassed' closing off full loops of hoses to the front of the coach.

On AC, I'm not up on these enough to know why the passenger side would work while the driver side was not. I loose or crushed hoses could be involved..

Best of luck on solving this, and I'll follow along to learn with you,
Smitty

[roberto]

Paul: Had the same problem with my 02 Allure. My DS was inop. Turned out the pneumatic servo motor was hanging up due to the Z link catching on the side of the servo motor. So, my servo is under the coach next to the HVAC 'box'. Adjusted the Z link and now have correct heat or cold coming thru the vent.
Also, look for the seams leaking air on the HVAC box. Seal with Al tape used in a.c. repair from Lowes.
As always be careful under your coach. The area I mention is best accessed from the front. Lots of room to roam!
Hope this helps.

[dons2346]

Have you monkeyed with the funky switch that lets the pax control the settings?

[pumper9x9]

I was having a similar problem and asked the mechanics at OMC about and they hit a switch next to the one that activates the slid out floor that covers the stairs. It was a miracle, the heater started working.

[Mr_D]

Originally Posted by pumper9x9

Look under the dash and trace the hoses to the vent one probably fell off. Another thing to consider is running your generator and house AC while you're going down the road. There's been a lot of discussion on this subject. Some advocate that this will save you fuel others say that it just exercises the generator. I had a rep from Cummins/Onan state that the generator at max load will only use about a gallon of fuel per hour. If you have a Silver Leaf you can pick a flat stretch of road and check it yourself with the mileage readings. Good Luck

Silverleaf only keeps track of fuel used by the main engine, not the gen or AquaHot.

[dons2346]

Originally Posted by pumper9x9

I was having a similar problem and asked the mechanics at OMC about and they hit a switch next to the one that activates the slid out floor that covers the stairs. It was a miracle, the heater started working.

That's the funky switch I was referring to

[pumper9x9]

Originally Posted by dons2346

That's the funky switch I was referring to

Here's a picture of what the funky switch looks like. (see attached)