As per true title will it damage anything having run the air conditioning system with no gas in it?

Cheers

the system wont run as it will detect this.

That's right. The system notices when there's no gas and simply doesn't bother to spin the aircon compressor.

I had OE5 and 02h on the climatronic display and two zeros on the "19/4" setting so I feared that my compressor's gone. But after a refill the aircon came back to life!

Strange, car went in for an A/C service and when I picked it up was making a whirring noise.

They told me there was no gas in the system as there automatic machine was not working correctly. But if this was true it certainly would not run as you guys have said above. So now it has been regassed the noise is still there, so what is it! I think its from the climate control system as it stops dead when it is switched off.

Any ideas? Cheers!