I received a "Air Susp Inact" warning on my dash the other day. The car is frozen at normal riding height and I am unable to adjust the height up or down. The lights down by the height adjustment knob are not fully lit, they just have a slight glow only visible at night. I was able to get the compressor working by hooking it up to a battery. The compressor seemed to work fine. There is a brass valve located about a foot from the compressor and it is attached to the air outlet line from the compressor. I assume this is a blow off valve? Incase the compressor makes too much pressure? Anyway, when I was able to get the compressor running, I had air coming out of this valve. Does this mean the tank is full? After I turned the compressor off I took the brass valve off the line and no air came out. Does the storage tank have some sort of check valve so that the air cannot feed back to the compressor? I went underneath the car and loosened up a fitting on the valve block and air came out of the fitting, so I tightened that back up. Now I don't know what else to check. If the car is at the standard ride height, doesn't that mean I have air in the system? I have no blown fuses. If anyone has any input please let me know. Thanks.