Scirocco Register

Some more info etc here, Briano1234 knows his electrics, he's answered a lot of problems etc on the Mk1 golf forum.

http://volkswagenownersclub.com/vw/show ... ater-Gauge

http://www.toplessrabbit.com/forums/vie ... =27&t=2042

More guides etc here.
https://vwgolfmk1.org.uk/forum/index.ph ... -of-things

it does have a thermo stat in it doesnt it?
if it didnt have a thermostat in this might be your issue

had a check last night and yes there is a stat in and it does work as intended (opening at 87C)
I guess the problem is electrical then, ill pull the clocks and check the regulator today

Checked the regulator, just under 10v, like 9.95v so I think that's good, maybe I have the wrong sensor?