Unplug the low pressure cutoff switch and short the harness with a jumper wire. If the AC compressor cuts on and works, then the electrical portion is good and the low pressure switch is the fault. If not, check the fuse(s) and the relay. Also, you say it's full of refrigerant gas: make sure it's not over-full. That would prevent proper operation as well.
astra 1.7dti 02 horn not working
Vauxhall Astra was created in 1979.
Because it's made in Britain, that's why. :)
near side lights not working
Blown bulb.
There are many companies and websites that can offer a Vauxhall Astra MK4 for sale. Some of these companies that offer the Vauxhall Astra MK4 are Vauxhall and eBay.
If none of the brake lights are working i would suspect the brake switch at the brake pedal.
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