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We have a 2005 Dutch Star motorhome that is having a-c problems with the coach a-c.When the coach is at a idle it will cool to 57 degrees,when you take off and go down the highway it will go to blowing hot air in just afew miles,70 plus degrees.I have cleaned the condenser out,checked the electric vacumm pump,all seems okay.The blower continues to run at the same speed just turns to hot air.The drain line is open and runs plenty of water out.Any advice on how to cure this?
Here is a stab at it. Had the same problem. My dad said to add refrig. My thought was no way it is low cause it works at idle. Put 3 cans in before it showed full charge. Freezes me out at all speeds now.