Originally Posted by Bob Landry
Before you tear into this unit and create more problems than you can fix, measure compressor amp draw. The amperage on the data plate is based on an ambient temp of 95 degrees. A 10 degree change in ambient temp will cause a change of 1A in compressor draw. Interpolate in between. If the data plate says 14A, and the temp is 100, then you should read 14.5A. That will tell you if the unit is properly charged. This test is valid for both R22 and R410a.
I doubt you are low on charge. These units only hold a pound or so, so any type of leak is going to blow the entire charge and then there is no cooling.
I think your time would be better spent inspecting and taping the plenum where is goes into the ceiling vents(if it is a ducted unit) and around the ceiling registers. RV AC ducting is by nature installed very sloppily and you may be dumping cold air into the ceiling area where it is going to do you no good.
Thanks Bob, I figured you would chime in.
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