The next time it happened I stopped the car immediately and left the engine running. The front suspension was down so I could only get one finger between wheel arch and tyre - the rear was fine. Switched it off and restarted and then stood at the side to watch and the front never moved. I drove home on the two blocks of wood again confused as to what the problem could be. The spheres were brand new replacements from AEP less than a year ago and the LHM was replaced at the same time after three months on Hydroflush. The suspension has been Citroen's finest ever since
so surely it couldn't be the spheres. Checked the LHM tank and it's at the correct level, no air bubbles, and a lovely green colour.Yesterday afternoon I did some Citrobics. Initially from the high position the front would drop like a stone and the rear would follow in a really lazy fashion. Raising it up from the floor the suspension as a whole took an age to move and was very slow when it did. Two hours later I had it where the drop from the high point was very good at the front and, although much slower, the rear end did come down evenly. When raising up it now reacts more or less straight away but is slow to raise.
Initially I thought this whole scenario was one problem but I'm wondering if I have two separate faults ie air in the system and a sticking front height corrector?
So I have two questions: -
Is it possible for there to be so much air in the system from normal usage? (I cannot see any leaks at all throughout the system).
Is the only remedy to a sticking height corrector to remove and clean? The reason I'm not convinced about the height corrector yet is that when the rear one went about four years ago there was a bang and the rear suspension dropped to the floor . . . and stayed there!
Any ideas, knowledge or previous experience of this gratefully accepted.
(in eight years I've only had one leak many moons ago on the Anti-sink valve). The whole system has always been as tight as a drum.
in swmbo's car 
