New class a dash ac only moderate cooling

Stick a thermometer in the AC vent and see what temp the AC is producing. It is a new unit so I would think is not in need a service unless it is faulty. 40-50 degrees is about normal, lower for newer AC, but is variable to outside air conditions, A 40 degree delta T is reasonable. That class A has a lot of area to keep cool with that dash AC, and you are sitting behind a giant greenhouse.

wildtoad wrote:
How long had the mh been sitting in the sun before you started out and how long was your drive? Air coming out of the vent is going to be between 20-25 degrees colder than the air going into the return. So if the air going into the unit is 85+ then the air out of the vent may be around 65 and it will take a rather long time for it to get cold even longer to cool the place. Unlike a car, you are attempting to cool a poorly insulated small apartment that is already hot, with lots exposure to the sun to keep it that way.

I have a very old radio shack digital thermometer with a long wire sensor that I stick down the vent. It wouldn't hurt to have it checked though.

Class C's have a slight advantage in this are as the driver/passenger area is more closed in. I've seen some class A owners hang a curtain behind the two front seat to reduce the area that the dash air has to cool.

Hmm yeah I'll get a thermometer and check it. It was very high humidity as well yesterday. The air coming out of the vents could have been 65. I was sort of expecting it to be ice cold like a car.

Also I was towing so the engine was working. Not sure if the heat from the engine could effect the air temperature that would be coming into the MH.

I guess it's not really a big deal to run the AC it does a good job of quickly cooling down the coach.

Dash air may not cool the coach but the air should be just as cold as you feel out of an auto A/C. If not it needs work.

I keep the front and side shades down as far as I can and still see to reduce the solar gain from the windows. This helps a lot!

How long had the mh been sitting in the sun before you started out and how long was your drive? Air coming out of the vent is going to be between 20-25 degrees colder than the air going into the return. So if the air going into the unit is 85+ then the air out of the vent may be around 65 and it will take a rather long time for it to get cold even longer to cool the place. Unlike a car, you are attempting to cool a poorly insulated small apartment that is already hot, with lots exposure to the sun to keep it that way.

I have a very old radio shack digital thermometer with a long wire sensor that I stick down the vent. It wouldn't hurt to have it checked though.

Class C's have a slight advantage in this are as the driver/passenger area is more closed in. I've seen some class A owners hang a curtain behind the two front seat to reduce the area that the dash air has to cool.

Any way to find out what the air temp should be as it comes out of the vent or how I would even gauge it?

I checked owners manual doesn't say much about it.

Cool But Not Cold tells me something's out of order in the A/C system. Either the system's not making Cold (technically not removing Heat...) -OR- something like a blend door isn't working properly. In most modern automotive setups, the A/C is producing all the Cold it can and the Heater is producing all the Heat it can. The Blend Door gets adjusted to balance the Cold and the Heat to give you the temperature you want.
I can easily see where a Class A windshield is a huge heat source. Many Class A's have supplemental fans up in the front corners to circulate the air in an attempt to help keep the driver and passenger comfortable.
Still, Cool But Not Cold on a 2013 coach tells me you should have it checked and corrected under warranty.
And... Jealous! I like those Winnie Vistas!

85+ then I run dash, generator and roof AC's. I think it's an "A" thing. Lots of area to cool when it's that warm out.

Have heard of people hanging a make shift curtain behind the front seats but have never done that myself.

Happy Camping!