I live in Arizona , where Nevada , California and Arizona come together. The summer heat has started as it was 115 hear today. My question is , my rooftop Ac unit seems to be struggling to keep up to wear it starts blowing warm air. At night and in the morning it runs great and will freeze you out , there is no shade trees here as it's the Desert , would putting a reflective cover over my AC unit help to keep the air flowing cold ?

If the outlet temperature is 20F cooler than the inlet temperature it's working correctly and you have inadequate cooling.

We had the unit serviced at the end of November and was told all was fine with the unit.

When it blows warm air your comprssor has shut off or frozen up. I had one acting similar to that and it was a bad thermister.I would be very surprised if one AC could cool an RV in those temps but you didn't say what size your RV is.Good luckTo answer the other part of your question, any thing you can do to keep the AC unit cool will help some.

I just drove through the area yesterday, thermometer said 112 outside. With both A/C's running in a 40' coach, it was still hot.Bottom line, very unlikely that yours will keep you very cool in daytime temps like that even if the entire roof was shaded.

Secure your RV and move into an apartment for the summer, especially if all you have is one A/C. Perhaps you could add a second A/C. And remember that your RV is poorly insulated, not much better than a Coleman cooler. Stick and bricks have, what, at least 6" of insulation? Your RV has maybe 2" styrofoam? Are your windows double pane? I've got 3 A/C and they struggle. Sad to say most if not all RV's aren't made for extreme heat.

Arizona and AC | Good Sam Community

tempforce
Explorer
May 30, 2020
only way to keep a unit cool in that heat is to keep the sun off, add roof insulation or a reflective surface. just as a note, if you buy a new unit, have them install a extra layer of roof insulation and a reflective barrier.
DallasSteve
Nomad
May 30, 2020
RVs are not built for temp extremes, high or low. They are built to move. You either need to get out of Arizona or get into a house or apartment. I was in Georgetown, TX last month and it was starting to get into the 90s. So I got out of Georgetown and now I'm in cooler NW Arkansas, but next month it will start getting sticky here. That's why RVs have wheels.
Mrblueeyes2020
Explorer
May 30, 2020
I live in a house , was cooking the RV off getting it ready for the wife's birthday weekend next weekend . I'm thinking about getting a portable AC unit and hopefully that will help cool it off as well . Thank you all for your input ,it is greatly appreciated .
azdryheat
Explorer
May 30, 2020
Secure your RV and move into an apartment for the summer, especially if all you have is one A/C. Perhaps you could add a second A/C. And remember that your RV is poorly insulated, not much better than a Coleman cooler. Stick and bricks have, what, at least 6" of insulation? Your RV has maybe 2" styrofoam? Are your windows double pane? I've got 3 A/C and they struggle. Sad to say most if not all RV's aren't made for extreme heat.
rdhetrick
Explorer
May 30, 2020
I just drove through the area yesterday, thermometer said 112 outside. With both A/C's running in a 40' coach, it was still hot.

Bottom line, very unlikely that yours will keep you very cool in daytime temps like that even if the entire roof was shaded.
12th_Man_Fan
Explorer
May 30, 2020
When it blows warm air your comprssor has shut off or frozen up. I had one acting similar to that and it was a bad thermister.

I would be very surprised if one AC could cool an RV in those temps but you didn't say what size your RV is.

Good luck

To answer the other part of your question, any thing you can do to keep the AC unit cool will help some.
Mrblueeyes2020
Explorer
May 30, 2020
We had the unit serviced at the end of November and was told all was fine with the unit.
CA_Traveler
Explorer III
May 30, 2020
If the outlet temperature is 20F cooler than the inlet temperature it's working correctly and you have inadequate cooling.

Forum Discussion

Arizona and AC

About Motorhome Group

Related Content

Arizona Sites

Arizona Purchase

Arizona in winter

I40 in Arizona

Arizona State parks