Air Dryer Purging Air Every 15 Sec

[Bengy88]

Unless it’s some weird shi#t like JMBT had goin on If a shop can’t figure that out in an hour or less you need a new shop buddy. And that’s giving them a little time to play with. Most of the time it’s as Rawze said the governor is plumbed wrong….. or an air line is broken. Depending on how your governor mounts there is usually 2 air lines. For example a D2 governor will have 3 sets of ports, 3 will be labeled res, 3 will be unl, and one port is exhaust…. Never block the exhaust port. The “unl” port will go to the air compressor head and to the air dryer signal, the “res” goes to a main air supply. It’s literally that simple…. If the governor is plumbed correctly and the “unl” line to the compressor doesn’t have a leak but it’s still purging every 15 seconds then your unloader valves are most likely stuck in your compressor and when the governor sends the signals the compressor isn’t unloading so the air dryer is purging every time signal is sent.