Having a look on TIS and I would also check fuse 17 in the Instrument Panel Fuses.
Here's a Schematic for the above.
Also fuse 18 in the engine compartment there is also a relay K04.
Here's the Demister Schematics for the above.
The Demister should work once the engine is started.
Also not all cars will have all the fuses relays etc.
Astra-J 2.0 CDTI S/S
Retrofitted AFL, TPMS, Navi950, BT, DAB, Rear Camera, Infinity sound system, Towbar, Flexfloor & more.
I can do programming and retrofits using genuine GM MDI and Dealer software.