Air conditioner question.

[Walt]

I own a 2010 MS 32RS3. The few times I’ve used the air conditioner it doesn’t seem like it is cooling the trailer down more than 8-9 degrees below the outside temperature. I’ve taken the shroud off the unit and everything looks okay. Should I expect more than 8-9 degrees lower than the outside temperature? I just got back from Yuma, AZ where it was upper 90’s and inside the trailer it was upper 80’s. Not much air is coming out the inside vents and especially the bedroom vents. Any ideas?

[wingnut60]

Take off all plastic vents and check to see if the ducts have come loose, not unknown that this will happen.
Also, the check the AC operation, get a thermometer and put in several of the vents---the best any AC will do is about 20d differential--what ever is going in almost never will be colder than 20d less.
Under the shroud, is the gasket in place along the metal that forms the compartments? You may need new gaskets. Also, sometimes the gasket between the AC and roof has lost its seal, might check that--but you will need to lift the unit to see.
In case you aren't aware--both ACs are connected by an 'H' pattern ductwork, and while the LR AC is mainly for the LR, it will get some air to the BR, and BR to the LR.
In Phoenix in Aug at 110d full shade, both ACs in our '05 had to stay on all day to counter the cooling loss. Shade is necessary most of the time to be comfortable, tho with both ACs on, it should gradually get the inside comfy.
Does one of your ACs happen to be a heat pump? If so, it will struggle to counter AZ summer heat.
Remember, the ACs can do no better than take the inside air and cool it around 15d; if working correctly, this heat exchange will gradually cool the inside down unless you are losing cooling to air leaks and poor insulation. Again, try to find some shady sites in summer?? if at all possible, big difference.
Hope some of this helps.

[Stripit]

Just to make sure you have cleaned the air return filters? Dirty will limit air flow and cooling.

[Walt]

Hi Stacey, I only have one AC unit. I'll take off the vent covers and check the ducting and air return filter. Yes it is a heat pump. I was in the direct sun with no shade. I've looked at the gasket under the shroud and it looks good. Could be the gasket between AC and roof but I'll have to find a tech to check it as I don't like climbing on the roof anymore. You weighed my trailer years ago in Lake Havasu City at a Sunshine RV rally. Thank you for the suggestions. Walt

[golf_bears]

If you have never cleaned the condenser and coil you may want to consider doing so. It can make a difference. Chemicals in spray cans are available for this type of cleaning job.

[wingnut60]

Since you only have one AC, and it is a heat pump, you are needing to stay out of 90+ heat and 35 - cold----your heat pump is an air-to-air mechanism, and if the available air is too hot or too cold, they just can't keep up. Perhaps a small 110 space AC would help you survive.