Central heating gas boiler not going on...

[paul k]

Hi Guys -

We have a typical gas central heating system with a wall mounted thermostat, normal radiators and a wall mounted water/ heating control box unit which is quite new.

The control panel is situated in the dining room underneath the boiler.

The thermostat is an old Honeywell wall mounted job with a circular click dial situated in our hallway.

Up until yesterday everything was fine but then it appears that something has gone wrong possibly with the thermostat ? as we now have no heating - the gas boiler still works when we want hot water however the heating will not switch on - the thermostat clicks but thats about it...

We don't have thermostatic valves on our rads.

Any ideas / help would be appreciated - please let me know if you need more information...

Many Thanks,

Paul K

 

[wms]

do you have a mid pos valve (may be the fault) if you have try moving slider to manual pos see if boiler then fires when calling for heat. could be micro switch inside at fault on heating side or motor on head

 

[gas4you]

Change the valve head, or just the ch valve head if you have 2 x 2 port valves.