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a recent trip with the outside temp at 90 degrees we could only
cool our motor home to app. 82 degrees. Given this is a newer AC
unit (2 years old), we find this hard to understand. We only had
the motor home for 3 years before the first AC unit one failed.
It's worth mentioning ... we use the motor home sparingly so why
would we have a similar problem with the AC unit twice? Any
thoughts? Do you have one a/c unit or two? John Blue The A/C
will only drop the temp down 18 to 20 degrees at best. The
insulation in a motorhome is only around 1-1/2" in roof, walls,
and floor. In a house 6 to 9" in roof, 3 to 4" in walls. The
same A/C rules hold true in a house as a motorhome. This is
called the temperature difference. Test the air flow at return
duct and then take a reading on output duct. The reading
different will be 18 to 20 degs. if system is working well. You
have two 13,500 BTU systems that pull around 12.5 to 13 amps
each. If you have a 35,000