Central heating not working, hot water fine (oil fired)

[purplehands]

Hi all,

Wanting some advice before calling an engineer. Central heating will not fire up, I've tried selecting all settings on timer (auto/all day/24 hours) no joy, nothing happens at all other than the click and red light coming on. If I select hot water theres the click and red light but then the boiler fires up as it should. Is this a job for an engineer or is there something I could check first?

Horstmann Centaurplus c27 timer
Warmflow 90/120 Whitebird boiler with Riello burner

Thanks

 

[45yearsagasman]

You haven't described and other system controls ie motorised valves etc but if you have either a 3 port valve or 2 x 2 port valves then thats where to look first to check these valves are working.

 

[moliver34]

If the boiler fires up when the system is calling for hot water, then there is nothing wrong with the boiler.

Its sounds like there is a fault with a two or three port valve. Its possible the valve is not opening correctly and so not switching on the boiler.