Hi everyone.
I have a 2003 Discovery II - recently purchased with the aim to tidy it up. I replaced both air bags as passenger side was leaking.

Bags seem to drop when left overnight. Compressor will only run when the veichle is moving and will not inflate the bags if left stationary.

Same for rising to off road height... jeep needs to moving - if the button is pressed when stationary, I get three beeps and the light immediately goes off again. Once I'm moving slowly in low box and press the button, it works fine.

When bags are inflated there is about 1.5 inch of a difference in height.

Is this a door sensor issue or could it be all related to faulty height sensors?...perhaps something else?? No suspension warning lights illuminated on dash.

Any help would be greatly appreciated

Hello and welcome

Welcome to the forum

This section is for introductions only. For technical help you should post your questions in the vehicle specific sections listed below, where owners of those vehicles will offer advice.

Main forum index:
https://www.landyzone.co.uk/forum

Discovery:
https://www.landyzone.co.uk/forum/land-rover-discovery.8

Welcome, ask your question in the Disco section and you will get some informed answers. Everything you have said seems fixable to me, with the possible exception of this " jeep needs to moving" Calling a Land Rover a Jeep is heresy around here.