hot weather cooling

Just out of curiosity, what color is the Winnebago Motorhome? The newer "trendy" RV's seem to be black or a variation thereof. I would imagine that they are increasingly harder to cool.

Dennis12 wrote:
From my research, it appears that a vent output temperature of 40°F to 45°F (4°C to 7°C) measured after driving for 10 minutes at 45+ mph would be reasonable on a 85°F (29.4°C) day with 70% relative humidity. Measurement would be taken from a console vent using a precise stick & dial thermometer. You can check your AC buy doing this and then go from there

Good explanation for a dash A/C but the OP is asking about the house unit since he mentioned that it is a basement unit.

dogvetia wrote:
we currently are in a basement air Winnebago motorhome and a little discouraged by it ability to cool the interior while setting in the sun at 96 degrees outside. Maybe I am unrealistic to think it should be cooler than 85 inside. Thinking of moving to a 5th wheel. Is there a brand or model capable of staying 75 or lower in the above scenario? If so what is your recommendations? Tom

Size of mh , (1) AC or 2, any shade, all slides out, blinds closed.
Our Jayco is 35 ft & has the polar insulation package & 2ac's. we have been comfy in 100+ days. Have the system checkedd

Are you turning it on after it's already hot out, or do you turn it on earlier in the day, before it's maybe really needed? We find that if we turn it on to say, 65, in mid-morning before the peak heat, it helps keep it cooler even when it's 95-100 outside later in the day, since the AC doesn't have to work as hard since it's been on already.

Do check to see if you have cool air coming out of your AC. All brands work well when new. There is some difference in noise.

You should be able to get the temps lower than 85, but also consider adding Reflectix to the windows and use shade fabric to shade the sunny side of your RV.

From my research, it appears that a vent output temperature of 40°F to 45°F (4°C to 7°C) measured after driving for 10 minutes at 45+ mph would be reasonable on a 85°F (29.4°C) day with 70% relative humidity. Measurement would be taken from a console vent using a precise stick & dial thermometer. You can check your AC buy doing this and then go from there

I agree fix your AC situation. Maybe even add a another is your wiring can handle it. Or buy that new RV you want. JMHO

Well, I am in sunny 95 degree weather here in east Tennessee. Thermostat set at 78 and keeping cool. True that latter in the day when it really heats up, the compressors do not cycle and the temp may rise to 79. This means the compressors are constantly working and pumping out air that is about 65 degrees. Since we have overhead ducts they are constantly blowing all that cold air on my head. Have to wear a cap inside.

A problem you may be having is a separation in the duct that runs up from the unit to where it splits into a Y to feed the two ducts running the length of the MH>. This has been a know issue. In fact, It happen to mine after about 2 years.

Another possible is that #2 may not be coming on. #1 comes on first, then #2. To check, Trip the breaker on #2. Turn on the system and let run for a few minutes. Then turn on #2. You should be hear it turn on. Another way to test would be to plug into a 30 amp circuit. Turn #2 of and read the amps, Then turn on #2 and see if the load increases. This will tell if #2 is working.

Other that getting a tech to come out, that all I know to suggest.

Just slightly off topic but I would have a technician look at the a/c to be sure it is working properly. Seems like it would be cheaper to replace the a/c than buy another RV unless you really want another RV and am using the a/c problem as a motive...