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Cal Krupa
07-25-2018, 07:23 AM
Does anyone know how to change the pressure on the aux air compressor which is a Thomas/Gardner Denver installed by Marathon? It won't start until the tank pressure drops to 40psi which is not enough air to keep the windows open which are air cylinder operated on my 2001 XL. It kicks out at 80psi.

The pressure switch is an internal unit.
Cal

Gil_J
07-25-2018, 08:30 AM
Cal,

Are you sure there's not a pressure switch in the compartment under the driver's seat. Most Marathon's disrupt power to the compressor here.

Cal Krupa
07-26-2018, 06:15 AM
Gil, I will check.

Thanks

Cal