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Coach 647 2003
When i turn on Levling sys. all yellow lights go out except the rear light. I dont know if one or more six pack valves may not be opening or closing as it should be. Coach is in my shop and level at front and on the line in rear bath. Computer pad keeps flashing red will not go in sleep mode and my 110 compressor keeps running while pad is on. I need some expertise on how to trouble shoot.
Thanks,
James Price