Air Leveling Issue

[Richard Higley]

I have a 2005 Patriot Thunder. My coach has HWH air leveling.  Occasionally after the coach has been leveled and and the leveling computer auto adjusts, the air compressor comes on and then there's a noise from the right front of the coach that sounds like a pop or maybe a pressure relief valve. It does this several times and then stops.  Wondering if anyone has an idea of what the problem might be. Thanks.

[Keith Moffett Co-Admin]

When on air leveling there is an air electric compressor which keeps the pressure up so the system can adjust as needed.  When it senses the level is out it adjusts and that may be what you are hearing.
I think I have that right though air leveling is new to me too.

[Richard Higley]

Keith, I hear the compressor run, but after a few seconds there is a pop. Sounds like a pressure relief valve. This repeats for a couple minutes then stops.

[Jerry Emert]

Mine does the same thing at the end of every cycle when the compressor is working.  I just took it as normal and ignored it.

[LaMonte Monnell]

Same on mine. It's just the way it is I guess.

[Keith Moffett Co-Admin]

Sorry guys but I have never heard a pop sound on ours.  Perhaps I should pay more attention.

[Joel Ashley]

Ditto;  no popping noise.

[David T. Richelderfer]

Double ditto.  I rarely hear the compressor, and no popping noises.

[Neal E Weinmann]

Normal routine on ours is hearing a pressure bleed off what I expect is the high zone, followed by the pump coming on (very quietly) to ostensibly bring up the opposing low zone. As the pump shuts off, there always seems to be pressure bleed from the pump. To my ears, the sound mimics a bit louder version of quickly opening the screwtop on a bottled carbonated drink with a bit of a whistle added in.

[Roger Rempe]

Well put Neal...mines the same!

[Jerry Emert]

Normal routine on ours is hearing a pressure bleed off what I expect is the high zone, followed by the pump coming on (very quietly) to ostensibly bring up the opposing low zone. As the pump shuts off, there always seems to be pressure bleed from the pump. To my ears, the sound mimics a bit louder version of quickly opening the screwtop on a bottled carbonated drink with a bit of a whistle added in.

Exactly the noise I hear and a great description!

[Edward Buker]

It may be a normal vent function built into the pressure cut out switch. I have heard that on other compressors as they reach cut out pressure and kill the power to the motor. The compressor manufacturer or the leveling system company should be able to tell you for sure.

Given so many hear it, sounds like part of the normal function.

Later Ed

[Jerry Carr]

no pop on ours we did change the air compressor to a viair when the HWH failed

[Gerald Farris]

Most HWH air leveling systems have a small water separator in the compressor discharge line that vents to purge any collected water at compressor shut down. The compressor location differs greatly with different year models from in-between the front axle and front cap to above the rear axle, so all coaches will not sound the same, and some of us old guys just can not hear that well anymore.

Gerald

[Robert Wagner]

We hear the bleeding off when releveling and then we will hear front come on and lift front end up to relevel. Have never heard a pop sound ever.

Let us know what you find out.