The welder was fine it's was the foot pedal I got from somewhere else, worked in reverse so had to swap three wires around, looking on Google it's a...
Cooling system ready to refit as I now have 2 modified air pressure tested leak free radiators at last,out of interest I tested one of the old grotty...
Brilliant it's so satisfying when something finally works, worth the effort, I'd love to fit A/C as I took the whole system out of the Alfa donor car...
As you've pressurised the system try using a jumper wire to the ac compressor to see if it manually operates the coil and engages the clutch to rule...