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Originally Posted by 2008MDY
Snip:
Will level coach in either Auto or manual modes but will not hold level. Looking for help.
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So the system works but will not hold level, but for how long? If the 12 v compressor is not working then it should hold level for a day or two from the coach air system. After the coach air system pressure gets down to a certain point the 12 v compressor should kick on.
You had the system checked for leaks. So I would focus on the 12v compressor and determine if it's working properly. If the compressor is working then I would check the sensor that kicks on the compressor. Of course you could start the engine and let the engine compressor charge up the coach air system. Maybe once a day.