worcester 240 combi rsf

[obba]

the said boiler will not light. power light is on and when c/h is switched on the pump runs but the boiler will not light, if you turn the hot water on the boiler does not light. i have switched it off and gone through the instructions on how to operate it but still the same. all the normal relays appear to be operating for c/h and hot water and i have turned the temperature to max. it stopped working last night and nothing has changed with the system, gas cooker is ok

 

[zimmers]

so its a fanned flue right has it got a reset button i cant remember if its underneath the front panel or on top if its not that then try the air pressure swith open the front up and you will see a round plastic part with 2 rubber hoses coming off it only small normally red and white take the hose off the end so when you blow down the tube or try breathing in (sucking)your blowing into the aps is your fan running if it is that then try blowing the tube clear ,im pressuming theres no spark youll properley tell me its got a pilot light if so gas valve / pcb/ could be one of a few but if the pump starts and fan starts but no sparking try thr aps if your not sure the dont touch i shouldnt be saying this to you but if you do know a bit then try it

 

[zimmers]

it really needs a corgi reg fitter out as the venturi will need cleaning out if it is a fault with that fan aps

 

[clf-gas]

Zimmer, you first need to establish wether the fan is running to fault the APS,
If fan aint running is it the fan or is the feed to the fan at fault, cant remember if its x7, x9 or x10 to check feed, been a while since I worked on one of these.

OP, is the fan running on demand?.

 

[bengasman]

Pump runs, but does the fan run too? If so, does the aps make?
If the fan does not run, check the thermistor