british gas C1 / worcester si

[buckley plumb]

been to this today and phoned Worcester tech who were not much help. boiler fires and flame on for 1 min during this time the sparker is still sparking every 10 seconds then repeats the process .checked continuity from end of probe to board so cable is ok.removed cable from probe and put meter on micro amps and tested - with gas off and boiler turned on got 1micro amp which didn't change when sparking (was expecting 5ma min) .but when gas was turned on and the boiler fired and flame on got 9micro amps. spoke 2 tech twice 1st time I was told I should get 14micro amps and its the probe . 2nd time told I should get 5 micro amps when sparking.by this time my head is spinning -leave job and manage to call a Worcester engineer who seemed to think I wouldn't get a micro amp reading while its sparking but would once its lit.anyone got any advice on these boilers . a weird thing I noticed was with the combustion cover on the boiler sparked and fired for 1 min sparking every 10 sec but when removed the boiler sparked but no gas but then removed the insulation cover and it sparked and lit for 1 min sparking every 10 sec. I am thinking board .

 

[diamondgas]

I'd be thinking the same mate ... Did you check polarity? Ignition pressure? flame envelops probe? Basic stuff I know but sometime we can get too technical and miss out the simple stuff!

Id go back armed with flame sensing probe and PCB if I knew everything else was what it should be..

 

[Anton]

Check the low gas (ignition) pressure setting, raise it from 0.7mbar to 1.5mbar
Check the lead connections on the spark rectification electrodes, they must be fully fitted on the spades. (these are from BG's fault finding guides for this boiler)
Also, this boiler does not ignite well with the combustion cover off, this could be misleading when you are fault finding because the draft from the fan disturbs the air/gas on the burner. I think if you make sure the electrodes and leads are on ok, refit the front and raise that low gas pressure as above, it should hopefully solve your problem.

 

[buckley plumb]

I'd be thinking the same mate ... Did you check polarity? Ignition pressure? flame envelops probe? Basic stuff I know but sometime we can get too technical and miss out the simple stuff!

Id go back armed with flame sensing probe and PCB if I knew everything else was what it should be..

ignition press was ok it would run in full flame hw while sparking .getting probe and think i may have old pcb in garage to test

 

[buckley plumb]

Check the low gas (ignition) pressure setting, raise it from 0.7mbar to 1.5mbar
Check the lead connections on the spark rectification electrodes, they must be fully fitted on the spades. (these are from BG's fault finding guides for this boiler)
Also, this boiler does not ignite well with the combustion cover off, this could be misleading when you are fault finding because the draft from the fan disturbs the air/gas on the burner. I think if you make sure the electrodes and leads are on ok, refit the front and raise that low gas pressure as above, it should hopefully solve your problem.

only one flame sensing probe on this boiler and i think it rectifies to earth on burner .boiler would run in hw on full flame for one min while sparking then flame go out and repeat process.what puzzles me is no fault lights

 

[diamondgas]

What low burner pressure is the boiler running on buckley plumb? As Anton's mentioned, the 'low' bp setting can be raised slightly. Accordding to the mi's the boiler fires for a minute on full rate then drops back to low after ignition before modulating thereafter. It's possible that when it's proven the flame and drops back to minimum the gas is actually 'droping out'. Keep your gauge on the gas valve and watch what its doing during ignition. It could be the reason for repeated ignition.

 

[buckley plumb]

What low burner pressure is the boiler running on buckley plumb? As Anton's mentioned, the 'low' bp setting can be raised slightly. Accordding to the mi's the boiler fires for a minute on full rate then drops back to low after ignition before modulating thereafter. It's possible that when it's proven the flame and drops back to minimum the gas is actually 'droping out'. Keep your gauge on the gas valve and watch what its doing during ignition. It could be the reason for repeated ignition.

hi steve nice to see you back on here mate. been back to it this morning - tried probes and no joy , increased burner min press to 1.5 and then 2mb and still the same - took a known good board with me off my brothers old boiler and put that on and all sorts of errors come up - it was older board with code plug socket the one on the one that has problems has no code plug socket so is newer board .assuming older board not compatible . definatly think pcb now but customer said unless 100% sure they wont pay for pcb unless it fixes it - so not wanting to be stuck with a board I walked away and advised them to call Worcester .

 

[diamondgas]

There's one other route you could have taken Ant ... Ignite Heating Spares UK, - refurbished parts for domestic heating systems and boilers These boys suply reconditioned PCB's with a 12 month guarantee! I've put a few custards in contact with them so that they take the responsivility of ordering and waiting in for delivery. I'll then fit the part... One to considder for the future maybe and an alternative to offer the custard who winges about cost!

Regards walking away I'd have done the same mate! If it's cost you nothing but time then at least you've got to mess around a bit with a pain in the but fault and maybe learned a thing or two eh?

 

[buckley plumb]

definitely learned a bit more mate .before I worked for my self got most faults 99% correct as had the confidence that I was not paying for the parts . now people want guarantee the part will fix it and wont pay if it does not - being sole trader cant afford outlay if not sure.went to a ferroli today with siemens rf controls what a combination . thanks for link

 

[diamondgas]

definitely learned a bit more mate .before I worked for my self got most faults 99% correct as had the confidence that I was not paying for the parts . now people want guarantee the part will fix it and wont pay if it does not - being sole trader cant afford outlay if not sure.went to a ferroli today with siemens rf controls what a combination . thanks for link

Sometimes it's the chance you have to take regards the PCB's. At least down the refurbished line it's not such a big hit if you're not sure

I think ferroli and siemens are a perfect match :rofl: Both bum fodda!! :lol:

 

[buckley plumb]

Worcester been to it today - was the board and while there they replaced the aps and prv all for £238 fixed price. how many engineers suggest this option to their customers ?

 

[diamondgas]

Personally i think you did the right thing by suggesting getting the manufacturers out. End of the day you're safeguarding your own pocket as well as giving honest advice IMO