Worcester Combi boiler ignition problem

[shavy65]

Hi there, this is my first post, hoping someone out there can help me!

I have a Worcester 28i RSF Combi which is not igniting. I have fitted a new Air Pressure Switch but still same problem. If I remove white pipe from connector and suck into pipe then switch clicks and boiler ignites no problem. Once I have done this the boiler operates correctly until it shutsdown and then won`t start again without my intervention. also both pipes appear clear and fan seems fine

Hope someone can help. Many thanks

 

[adlplumbing]

without looking it could be faulty pcb

 

[shavy65]

Thanks for the reply. I cosidered that. If the PCB is faulty should the air pressure switch still not `make` and then the start up sequence fail somewhere else on start-up?

Also wondered if the fan might not be operating at its full capacity therefore not `making` the air pressure switch, any idea if this is likely?

 

[kevplumb]

get it serviced PROPERLY

PCB my ass

 

[shavy65]

ok, I take it its something more serious than an amateur like myself can rectify?

I`ve repaired some minor problems in past such as sticky fan, replaced APS, pump, but Im starting to think this may be over my head this time.

thanks

 

[kevplumb]

get a decent rgi to give it a good service

 

[shavy65]

Sorry but RGI?

I take it thats just a registered person, is it? It was actually serviced by an authorised person in August

 

[kevplumb]

did you miss decent and properly

any clown can hoover a burner

 

[shavy65]

ok, thanks, taken onboard.

Anyway, does anyone else have any ideas before I call out someone?

Cheers

 

[Gasguru]

Is the red sealing cap in place on the flue gas sample point on top left of the boiler?

 

[shavy65]

Hi thanks for the reply.

Yeah the cap is in one piece, and both the pipes are not blocked and not leaking.