I have gassed the aircon on my astra G but its still not working.. There's no power to the compressor. What fuse is for aircon compressor?

In an Astra G, the fuse for the air conditioning compressor is typically located in the fuse box under the dashboard or in the engine compartment. You should check the owner's manual for the exact fuse number, as it can vary by model year. Additionally, if the fuse is intact, the issue may lie in the compressor relay or wiring, and further diagnosis may be necessary.