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Old 07-23-2014, 06:21 AM   #1
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HWH Won't Level

I have a 98 Intrigue. The site we are on is off level just a bit. The coach leans toward the driver side. When I attempt to level the coach, the HWH will release air from the passenger side then the air compressor comes on. It will run until the excess slope light comes on then the compressor turns off. I could except this if the driver side had raised even just a little, but nothing happens. There is a normally closed solenoid valve right after the dryer cartridge. I do need to check that, if it doesn't open then no air will go into the system.

I tried to level the coach while the engine was running but after the air was released from the passenger side the air compressor still came on. It didn't even attempt to use the air in the tanks. I'm open to any suggestions.
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Old 07-23-2014, 08:09 AM   #2
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the air system is designed to drop the high side first, then drop the high end.
if not enough chassis air is left to raise the low side, the compressor adds air. if you have a small compressor, it takes a long time.
the excess slope light may be indcicating you are in a no level situation.
the leveling system is limited by the height of the air bags. if you have 6 inch air bags, you have essentially 4 to 5 inches of real leveling capacity. there is a bumper inside the air bag that doesnt allow it ti completely collapse.
download a service manual for your system. it should be either a 500 with a 14 inch control box, or 600 with an aluminum box about 6x x8 x3, it may be a double box depending on your model.
the 14x 9x 4 inch box on the 500 system is normally located in the ceiling of a compartment. the 600 system box is located normally under the dash. someone with a similar coach would know more about the location.
do the diagnostics. that should tell you what the problem is. there is a good section on the compressor. if the compressor is coming on, check the water seperator bowl for cracks.
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Old 07-23-2014, 09:47 AM   #3
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Does it act this way every time you try to level or just once in awhile?
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Old 07-23-2014, 10:20 AM   #4
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Steve, can you manually raise the driver's side?
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Old 07-23-2014, 10:31 AM   #5
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Put some blocks uner the wheels on the low side the try to level again. You may be at a level limit.
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Old 07-23-2014, 12:19 PM   #6
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I received a PM from AZPETE, He is an HWH Tech. After speaking with him on the phone my problem may be the check valve at the discharge port of the Parker dryer canister. The slope on the coach is not enough to cause the excess slope light to come on. The system at present is satisfied and shows a level coach. I know my compressor works, so what was happening was the check valve was not opening allowing the air into the air bags. Now we'll see if it will maintain level with help from the air compressor. If not then I'm going to replace the check valve.
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