Good Sam Club Open Roads Forum: Dashboard Vent Air VERY warm
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Open Roads Forum  >  Forum Posting Help and Support

 > Dashboard Vent Air VERY warm

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RescueDogs

Longmont CO

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Posted: 11/06/18 09:44am Link  |  Print  |  Notify Moderator

Hi everyone. I'd appreciate any feedback on this topic, even if you can tell me that you have a similar class C and DON'T have this problem as the dealer told me there isn't anything that can be done as this problem is true of all class C's, which I find hard to believe. I have a 2007 Jayco 30' Class C on a Ford E-450 chassis with a 6.8L V10 engine. Once the engine warms up and I have the dashboard air selector on the vent setting, the air coming out of the vents becomes quite warm. When I change the selector to A/C I get appropriately cold air, and the other settings (e.g. defrost) also work fine, so I'm assuming it isn't a vacuum problem (but I may be wrong about that). The air gets so warm while I'm driving that the cabin gets quite uncomfortable and I have to put the A/C on. The service department at the local Ford dealership never bothered to investigate this issue and suggested that I should simply select the "floor" or "mixed" settings when I'm driving, which does provide cooler air but of course that air doesn't come out of the dashboard vents. After running the A/C until the cabin is comfortable, I then switch the selector back to the vent setting. The air is then initially cool but it once again gradually becomes too warm and I have to put the A/C back on. I bought my RV used in 2010 with 3,500 miles on it. I don't recall this being a problem initially so I have to assume something is wrong. I'm at the point that I'm ready to try modifying the air intake to the vent but before doing so I thought it was worth seeing if anyone else has had this problem and/or if you have any suggestions. Appreciate any advice you can provide, even if you simply tell me you have a similar class C and don't have this problem. Thanks!!


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* This post was edited 11/06/18 06:11pm by an administrator/moderator *

Home Skillet

Pearland Texas

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Posted: 11/06/18 10:49am Link  |  Print  |  Notify Moderator

What is the outside ambient temps?

You may be picking up heat from the engine-since the HVAC ducting sit right on top of the engine compartment.

Also, there's a valve that shuts off coolant to the heater core. That maybe stuck.


2005 Gulf Stream Conquest 31ft
BigFoot Levelers,SmarTire,Bilstein Shocks,Trans temp guage,Lowrace iWAY

RescueDogs

Longmont CO

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Posted: 11/06/18 11:46am Link  |  Print  |  Notify Moderator

Home Skillet, thanks for your response. The problem is independent of the outside air temperature (meaning it occurs when the air is cold too). I do believe it is the engine heat that is warming the air. I have wondered if the heater valve might be stuck open and have removed the doghouse and looked under the dash and it seems the entire system is "self-contained" as I can't locate any valves that I can easily examine. Any thoughts on how I can check that out? Thanks again!

Bob in Boulder, CO

Farmboy666

Pisgah Forest, NC

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Posted: 11/06/18 04:16pm Link  |  Print  |  Notify Moderator

If the air temp changes depending on if it's coming out of the dash or the floor then it's not the temp valve it's the way the air is channeled. If that's the case then there is not much you can do, air is being channeled through a hot environment so it heats up. Just set the AC to a comfortable temp and move forward.

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