Wiring a boiler controller

[davesparks]

What I can't understand with these water heaters is why they don't build in an output for the control circuit, they have a protected output for the pump built in so why not for the control it would save a lot of messing around!

It’s cheaper for the manufacturer to not put it in.
the higher end units will have it included but in the lower end products these are the kind of corners that get cut to make them cheaper.

 

[Eliza Bennett]

Check your entire system for obviously loose connections, or failed circuits, and examine any fuses which may have popped out on your main board (if you have an older boiler, you may not have a main control board, and will need to check the fuses of all your devices). If you still cannot find a problem, you may need to call in an engineer.