Central heating not coming on

[Jon20]

Hi, I'm having an issue with the central heating not coming on. Bit of info about the boiler setup, boiler is an Ideal Classic SE15 FF, has a Horstman CentaurPlus C27 programmer, Honeywell tank stat and a Honeywell DT90e room stat. The light comes on, on the programmer for the central heating but nothing happens. Thinking that the room stat may of developed a fault, I got this swapped out under warranty today and fitted the replacement. Still nothing happening. Thinking now that the programmer may have gone wonky? Interestingly when the hot water is on the radiators are getting warm. Had an issue with the 3 way valve last year but changing the motor and freeing off the valve sorted it out. Would a faulty programmer cause the valve to get stuck in I presume the mid position? Or is it just coincidence that the valve may be worn out as well? Thanks.

 

[Jon20]

The 3 way valve is a Honeywell, I changed the synchronous motor last year. Suppose it could have broken again. I've took the cover off and there is a bit of movement when calling for hot water. There's no movement at all when calling for heating. So is that the programmer bust or the motor? Does the programmer tell the motor which position the valve should be in?

 

[Jon20]

Unfortunately it doesn't have lights to tell you the position. I'll check if the valve is seized tomorrow. If it is, looks like a new valve is needed so we'll have to get a plumber in to do it.