03-06-2022, 05:36 AM
My thoughts may be off base as my system is plumbed a bit differently, but here goes.
That solenoid valve may well be a normally open valve. In other words, when no power is applied it is open. The purpose, as Richard has already mentioned, is to relieve the pressure after the compressor stops so when it is requested to start again, it is not starting against 70 psi or so. For this to work, that solenoid valve is normally located between the compressor and a check valve. The check valve keeps the entire air system from draining back through the normally open check valve when the compressor is off. I think your symptoms may well be consistent with a failed check valve and there the possibility that the solenoid valve is not the issue.
That solenoid valve may well be a normally open valve. In other words, when no power is applied it is open. The purpose, as Richard has already mentioned, is to relieve the pressure after the compressor stops so when it is requested to start again, it is not starting against 70 psi or so. For this to work, that solenoid valve is normally located between the compressor and a check valve. The check valve keeps the entire air system from draining back through the normally open check valve when the compressor is off. I think your symptoms may well be consistent with a failed check valve and there the possibility that the solenoid valve is not the issue.
Russ White
2016 Winnebago Vista LX 30T
#530 ( Sold )
1999 45' Double Slide - Factory upgrade 2004