boiler will not light

[ChrisR]

It's the acoustic switch. If the fan noise isn't right it won't light the flame. Banging it makes it hear a broad-spectrum noise.

 

[ecowarrior]

Chris the Fs80f was the earlier model with the knock sensor - if was the FS80 e and later that had the acoustic switch. They do look similar but the early knock sensor had only two wires - the later acoustic meter had 3 wires & was driven by some sort of acoustic 'flow turbine'. The larfin shaft that the flow turbines span on used to seize but could be easily remedied if swapped for a giglin pin. There is an upgrade kit for it.

 

[Paul11]

thanks for all the GOOD advice chaps , did my own thing and replaced the fan with a recon part and now have a fully working boiler , had it serviced today

total cost inc parts £84 (£44 for the fan £40 for the service )

regards

 

[skodaman007]

£40.00 for all the labour,you got a bargain there.

 

[Paul11]

thanks for all the GOOD advice chaps . did my own thing and fitted a re con fan (cost £44) also had it serviced working perfect

regards

ps there are some wa****s out there

 

[Dan Robinson]

Yes there are .

 

[skodaman007]

i am not in favourite of recon parts on gas equipment unless the part has been supplied and fitted by a registered gas person who will issue paperwork/safety record of work carried out.

its all down to risk.

still labour at £40.00 you have found a decent gas man.