I had a problem with my air pressure relief valve staying open. Air pressure dropped to 70 pounds and held. Pulled over, called Freightliner - identified the situation and after 40 minutes on hold before they answered, restarted the engine and it went back up to 125 psi. Happened again the next day holding at 100 psi but you could hear the whoosh of air out of the relief valve on the dryer. Local Freightliner Service Rep here in Apple Valley, MN said that it was more than likely the desiccant filter and that would be the first thing they would change if I took it in to them. Had it fixed here on-site and at a much lesser labor cost.
Happy to hear Tre's better fortune. Yep! Temperature here today reached a high of about 70 degrees, if that. Around 1 p.m. we were out and about and it was 66 degrees. You need to move north for the summer months.
Wayne MSGT USMC (Ret) & Earlene (CinCHouse)
2008 Winnebago Destination 39W
It is what it is, and then it is what you make of it.