Potterto Performa 28 Flame Failure

[U1618]

Hello experts.
I would appreciate a little advice please.
I have read the other posts about this problem on this forum. Mine is also intermittent, could possibly be associated with windy days. Flame failure on fire-up using hot water and hot water + central heating settings. Also (not often) when the thing finally ignites, flame sometimes goes out & re-ignites. Inner chamber access panel seal appears OK. Fan comes on with good draught. Flue unobstructed. Idle water pressure increased from 1.5 to 2 BAR to no effect. Reset switch used no effect. Beginning to suspect Air pressure switch. Is there an easy way to prove diagnosis? anything more complicated I will leave for a professional, but as intermittent problem need to try to localise down a bit.

Many thanks

 

[twgas]

you need a RGI when removing combustion seals/panels.

 

[namsag]

What fault lights are coming on when it fails to come on

 

[gas4you]

I feel you need an RGI in to service thoroughly and check/set the minimum and maximum burner pressures.

I've had several with this fault that have just had the minimum setting drop way out of adjustment.

If HW is usually ok then it points to this problem.

 

[U1618]

What fault lights are coming on when it fails to come on

Many thanks, I only have one indicator light for "flame failure" (no clues there then). The trouble is the problem is intermittent, and whenever an engineer turns up it's working OK. The unit has been "serviced" (ie someone took the cover off & looked inside.) Maybe have to wait for complete failure I guess, which will probably be Christmas eve again - as with our previous!.

 

[U1618]

I feel you need an RGI in to service thoroughly and check/set the minimum and maximum burner pressures.

I've had several with this fault that have just had the minimum setting drop way out of adjustment.

If HW is usually ok then it points to this problem.

Thanks Dave, will print off this reply & point visiting engineer this way. It does sound like this could be the fault esp if Pottertons are prone to this happening. The thing has been well behaved for the past 2 years.

Chris.