There is a slow leek in the lines to the system. SO after sitting a while my rover will be setting all the way down, after I started it up I was able to hear the compressor com on and after sevral minutes the system we fill up in the rover would go up. the other day I wanted to go for a ride, I started it up and waited only this time it never did go up. I listend for the pump to come on and could hear it come on but after just a few seconds it would go back off. I was able to chec the relay and the fuse under the hood they both checked out fine. Is there another relay or sensor some where else that I am missing?
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Do you have access to a heated garage? If so put the truck in over night, it sounds like your air supply has frozen. You could also try a couple tricks that truckers use for this problem. Your air system should have a compressor and a supply tank. The tank might have a valve to bleed it, if so when you get the air system operating again drain the tank with this valve. This will clean the water out and do so on a regular basis. It should also have a way to get into it, perhaps a bolt or maybe an air line itself. Remove this and pour in some methyl hydrate ( wood alcohol). Not a lot maybe 1/4 cup at most and put it back together. The alcohol will melt the ice. If it still is giving you problems after it sits for a bit or there is no tank then remove the line from the compressor to the suspension and pour alcohol into the line. It's possible there is ice in there as well. All this water is a result of condensation and it is especially problematic when you go from wet to freezing. If you can't get methyl alcohol use gas line de-icer. Ideally though the heated garage would be the best bet. Hope this helps.
It needs to be working to blow air into your back suspention.The pump is under the floor by your door.Its in a drop down box.Check the pump your self or have some one check it for you before you buy a new one.Has i now the swiches infront of the pump fail and so does the micro swiches on the rear suspention arms The Micr swiches activate the pump and are a real problem with the land rover.I would change them firstly.The compressor pump is around $600 new.So check the above before replacing.Good luck phil.
The compressor just could be damage internally .
I would just loose a line off the compressor . Then put power to the compressor again. You should feel air coming out the line.
So if the air is coming out of the line. The system has check valves through out , or the air suspension shocks are probably leaking . I would then take to the dealer for the repairs or your local shop
There is a device called the ride height sensor, it may be damaged by letting the chassis sink down every-time you loose pressure in the system, it is what tells the control unit how much to raise the car to compensate for loads etc...
firstly check which part is leaking, pipes to the air spring, the air spring, or the valve blocks. replace the faulty part, and the compressor. because the compressor is damaged already wit the constant pumping of air for the airspring. to check leak in the system use soap n water using a bottle with a spray head.
Disconnect the thin wire on the suspension pump , this is the overheat switch which sticks at times.If it's working after that use a solution of dish liquid and water and spray this all over the pipes, connectors and air springs to find your leak.