HWH Leveling - 12v air pump runs almost every 15 minutes

[gpounder]

There is a great chance the leak is coming from the HWH manifold air solenoid. You have two sets, one for the front and one in the rear. Give them a good spray with water and listen real close you might just hear it leaking.

[jonemw]

On my 08 Allure, the system will level just fine , using the engine compressor. it will hold level for about 4-6 hours. Then i will hear air release as it lowers the hi side to match. Then eventually runs out of room, and the Thomas aux compressor comes on. This is never successful however, and after an hour or so of trying, will trigger the excess slope light. After this happens, the HWH goes silent and will not try again. I can tell if coach is level if bathroom door does not swing. Usually the off level is so slight it is not worrisome. Still bugs me that aux compressor can never get the job done, and just gives up with indicated, not actual , excess slope. Starting the Cummins and leveling takes less than 2 minutes . Then we start the process allover again Now , here is the good part. Colton has been chasing this for 2 years. Many expensive and cheap parts have been replaced. They are not charging me for labor, but generally only parts and a little bit if addressing a new area of the air system. Still have not gotten success with it holding air for 3-4 days.

[shootist]

Originally Posted by jonemw

On my 08 Allure, the system will level just fine , using the engine compressor. it will hold level for about 4-6 hours. Then i will hear air release as it lowers the hi side to match. Then eventually runs out of room, and the Thomas aux compressor comes on. This is never successful however, and after an hour or so of trying, will trigger the excess slope light. After this happens, the HWH goes silent and will not try again. I can tell if coach is level if bathroom door does not swing. Usually the off level is so slight it is not worrisome. Still bugs me that aux compressor can never get the job done, and just gives up with indicated, not actual , excess slope. Starting the Cummins and leveling takes less than 2 minutes . Then we start the process allover again Now , here is the good part. Colton has been chasing this for 2 years. Many expensive and cheap parts have been replaced. They are not charging me for labor, but generally only parts and a little bit if addressing a new area of the air system. Still have not gotten success with it holding air for 3-4 days.

Your pump is probably shot. They are good for about 100 hours is all

[vtwinwilly]

Originally Posted by jonemw

On my 08 Allure, the system will level just fine , using the engine compressor. it will hold level for about 4-6 hours. Then i will hear air release as it lowers the hi side to match. Then eventually runs out of room, and the Thomas aux compressor comes on. This is never successful however, and after an hour or so of trying, will trigger the excess slope light. After this happens, the HWH goes silent and will not try again. I can tell if coach is level if bathroom door does not swing. Usually the off level is so slight it is not worrisome. Still bugs me that aux compressor can never get the job done, and just gives up with indicated, not actual , excess slope. Starting the Cummins and leveling takes less than 2 minutes . Then we start the process allover again Now , here is the good part. Colton has been chasing this for 2 years. Many expensive and cheap parts have been replaced. They are not charging me for labor, but generally only parts and a little bit if addressing a new area of the air system. Still have not gotten success with it holding air for 3-4 days.

Let us know if you ever figure it out. Mine is very similar, but seems to work if all it has to do is adjust the front. If the rear has to air up, same as yours. Pump runs extensively, then goes into excess slope.

[Smitty77]

Just a wild shot... On our 04 Allure, with a Thomas pump. The air dryer had a glass bowl and an air valve on the bottom of it... Over time, condensed moisture would build up, dry and crystallize. The 'crystal's dropped down into the valve, keeping form working properly. And the Thomas pump would run and run, as air pressure was not being diverted into the lines, but exiting thru the open valve. A good cleaning. And then a policy of yearly inspection, cleaning and making sure that air dryer and valve were functioning well - solved this problem...

Sure would not hurt, to see if you have a valve not functioning, either by crystallize build up, or the solenoid not the valve not functioning properly... As I recall, the HWH brain will 'Attempt to Level' or Re-Level - for a set period of time, then shut off.

Good luck to you,
Smitty

[UniqueName]

If I turn off the HWH system after it levels, it sags badly to the left side after a few hours. I have concentrated my search on elements on that side. I think, but am not positive it's the front left mostly.