Sorry Madrab, I don't know what that means? It uses the same switch as the boiler, so if I turn the switch off, the boiler goes off too. When it's switched on then the receiver and boiler is on, does that make sense? But the receiver keeps going off, but the boiler is still on. It has previously been working fine for the last 4 years, so I can't believe it is a wiring problem (because it wouldn't have worked previously).
It's gone off 4 times since 6am this morning, I turn the switch off, then on again, and it comes to life (for a short time). Whatever the problem is, it's getting worse.