glow worm micron 50ff

[buckley plumb]

i feel as if glow worm boilers are haunting me with problems at the moment. went to a 50ff micron today locking out on ignition - tested aps all ok - boiler fan would run then gas valve would open no spark so i thought pcb and still do i think. demend on boiler fan run and operated aps - no spark just gas valve and gas several attempts before locking out - now for the puzzling part if when the gas valve opened i light the burner with ny blowlamp the ignitor would start sparking for 6 times and the boiler would be fine - it could then be turned on and off and it would work as normal igniting itself -but leave it for 20mins then the same again -fan and gas no spark . anyone come accross this . i phoned glow worm but they had no answer just said replace board but at £150 i want to be sure .

thanks ant

 

[Billy Bob Bob]

ignition and detection electrode in one electrode check for continuity on electrode and lead,if you dont get it theres your fault if you do its likely to be pcb

 

[Reg Man]

Microns had serious problems with hot spots on the PCB

 

[buckley plumb]

thanks . i checked the ignition lead from probe to board and got continuity so ordering board up for friday.


thanks again ant

 

[Plumbcrazy56]

I had a similar problem recently. I fitted new board costing £150 and all seemed fine for a few weeks,then customer said the same problem came back. I fitted new electrode £5. and it has been fine since. Made me think it probably wasn't the board in the first place.I would fit an electrode first and see if it cures the problem,

 

[mfgs]

The PCB's on these boilers are terrible.

 

[buckley plumb]

fitted probe and lead today no joy so waiting for pcb on fri
ant

 

[Billy Bob Bob]

fitted probe and lead today no joy so waiting for pcb on fri
ant

did you not carry out a continuity test first?you would have not needed to buy lead and electrode

 

[buckley plumb]

yes checked but thought it may be breaking down on load . changed board today. pump run and then fan then ignition and gas and burner lit.tested for half hour and all ok - just got a phone call to say boiler failed .customer said after reseting, the pump and fan would start and the boiler would light - burner light on then after 1-2 mins the boiler would go to lock out and for a short while the reset and burner light would flash the burner light flashing quicker- according to the manual a thermister fault glow worm did mention this could happen.looks like i now need to fit a thermistor -i hate glow worms -the only thing that worries me is that the pcb board in a sealed box mentions an additional capacitor that goes accros the sw live and neutral -this was not in the box -is this just to stop the boiler firing with no demand.

a very stressed ant

 

[buckley plumb]

why would glow worm suggest a thermistor fault may occur and why should it just by replacing the board

ant