howiesfmca

I had the same indication and took it to the Freightliner repair shop in Wilmington NC. They found the fittings to the air gauge fitting on the dash board cracked. Replacement of the gauge corrected the problem.

My electric water heater groans every time the hot water is turned on and only groans when the cold water is run and turned off. Believe it is the hot water check valve. Howie Snyder