Boiler failing to light

[Ben Stubbs]

Hi all - Got an old Worcester bosch 28i rsf combi that struggles to light - especially from cold.
When heat is demanded, the pilot light fires up first time every time, but then burns itself out - the ignition sequence repeats with the pilot light firing up but then burning out. The boiler eventually fires up after anything between 3 - 20 ignition cycles - first time everytime if the boiler is warm!
Had a new Gas valve fitted, new ignition sensor fitted, gas pressure checked and told is fine, fan and air flow sensor good - any ideas before I throw money at a new PCB for it not to work either? Sick of paying for new parts for them not to make any difference! Plus its a plumber friend doing the work - so its all getting a bit awkward!

Have noticed the upstairs hot water pressure has dropped over the last couple of years - used to be a hot strong flow, its now a very hot weaker flow - not sure if that's relivant or not or just a symptom of the boiler getting older!
Thanks for any help you can offer!

 

[Riley]

I’m not being funny mate I would seriously look towards a new boiler rather than continuing to throw money at that one I am dealing with exactly the same scenario with a landlord of mine and I keep telling him new boiler but he keeps insisting on throwing parts at it and it lasts for a few months longer and then something else goes.

 

[Rob Foster]

Hi all - Got an old Worcester bosch 28i rsf combi that struggles to light - especially from cold.
When heat is demanded, the pilot light fires up first time every time, but then burns itself out - the ignition sequence repeats with the pilot light firing up but then burning out. The boiler eventually fires up after anything between 3 - 20 ignition cycles - first time everytime if the boiler is warm!
Had a new Gas valve fitted, new ignition sensor fitted, gas pressure checked and told is fine, fan and air flow sensor good - any ideas before I throw money at a new PCB for it not to work either? Sick of paying for new parts for them not to make any difference! Plus its a plumber friend doing the work - so its all getting a bit awkward!

Have noticed the upstairs hot water pressure has dropped over the last couple of years - used to be a hot strong flow, its now a very hot weaker flow - not sure if that's relivant or not or just a symptom of the boiler getting older!
Thanks for any help you can offer!

Its bye bye time ....are you gsr ?
I am all for keeping units going but no, but what are you going to choose ? not another Wb I hope .....Rob Foster aka centralheatking

 

[Ben Stubbs]

I'm not GSR but my mate who's looking at it is - it's a mate doing a favour so his heart isn't really in tbh and is just suggesting parts for me to buy for him to fit rather than looking at it properly.
New boiler isn't an option really - can't afford it even on finance and we're looking to relocate in the next 2 years or so anyway so want to tick this one over as long as poss. Just wanted to pick your collective brains for suggestions before we try a new pcb.

 

[Riley]

Get your mate to register on here as you won’t get any diy gas guides here I’m afraid

 

[Rob Foster]

I am not sure if they do your boiler but Ignite Heat Spares do a wide range of high quality re conditioned electronic parts inc. pcb at really sensible prices
I have used them many times , if you dont see your needs on their website call them and see

I hope you get sorted out , lets us know centralheatking

 

[Ben Stubbs]

Thanks all - I'm not really after any diy guides (I'm not a competent diyer anyway) but I see your point - you don't want to be encouraging diy gas work!
I'm just trying to find out if you think it sounds like a pcb problem or if thats likely to be another £200 down the pan!

 

[Rob Foster]

Thanks all - I'm not really after any diy guides (I'm not a competent diyer anyway) but I see your point - you don't want to be encouraging diy gas work!
I'm just trying to find out if you think it sounds like a pcb problem or if thats likely to be another £200 down the pan!

ignite stuff is around £40 per board and they do WB

 

[Jones82]

fixed price repair with worcester bosch, usually about £300, they also do a monthly cost if youd prefer that