Central heating not working

[Jamkhop]

Hello

My boiler seems to work fine as I get hot water no problem.

The problem is that my central heating isn't coming on.

I have a Drayton SM1 control. The switch doesn’t work and the light won’t come on. It still makes the clock sound but the heating won’t come on with the timer either.

I have a wired denfoss thermostat in the hallway which we often use to regulate the temp. It doesn’t seem to be working -no lights coming on.
Thanks for any advice.

 

[Murdoch]

Could be a variety of issues. You really need expertise in electrics and faulty finding and some test kit