ariston a23 mffi

[MZR]

Hi all, i have a problem with the above boiler and the ignition lockout, the customer told me a few weeks ago it was locking out every hour or so and everytime i went round it didnt lockout at all but now its locking out every 5 secs or so i went round yesterday and the rads were heating up fine and the boiler didnt lock out but today the hot water and heating lockout after 5 secs any advise would be great ?

 

[diamondgas]

Something so erratic and intermittent I'd be considering condensate blockage if it's a condensing boiler?

 

[MZR]

Something so erratic and intermittent I'd be considering condensate blockage if it's a condensing boiler?

non condensing mate

 

[diamondgas]

non condensing mate

Oh well, worth a guess! I haven't seen one of these boilers

 

[GrahamM]

Oh well, worth a guess! I haven't seen one of these boilers

And you dont want to either!
Pile of plastic junk!

 

[buckley plumb]

pcb on the last I did relay kept dopping out

 

[MZR]

hmm i was thinking that bit strange how it was ok yesterday tho

 

[buckley plumb]

twin boards from memory joined by a loom - was fan relay

 

[MZR]

any way of testing it ?

 

[buckley plumb]

any way of testing it ?

the one I worked on would work or not work when I moved the board or pressed on it .call ariston they will talk you through testing - ensure continuity through loom from both boards

 

[RoryD]

I'd have to measure flow / return temperatures, check that the aps doesn't drop out....fan could be favourite to clean (heavy soiled blades)

 

[abc_plumb]

I've replaced a few pcb with these intermittent faults.
With faults like these sometimes you have to take a chance.