HI JUST GOT A SECOND HAND VARITAS 8 ALARM PANEL IT IS NOT WORKING OFF MAINS POWER. IT WORKS WITH A BATTERY. HOW DO I CHECK IF IT IS THE TRANSFORMER THAT HAS GONE
Hi i changed fuse in my daughters central heating and there was a flash and a bang from the programmer can I change it or is there something else wrong with the boiler, and there is no name on the programmer