Suprima lockout *again* (2 years after PCB repair and following recent heat exchanger replacement)

Do you get a brief burn, followed by shutdown? If so, check the spark gap, as this is used as a flame sensor as well, and if only marginally too wide gives a "no flame" reading, leading to shutdown. If this is the case then the boiler has another couple of attempts and then locks out. My suprima is quite fussy, and only works if the spark gap is on the minimum gap spec.

Lovely boilers!

Charles

Charles

No burn at all now. I'll try the spark gap adjustment. As I said it /did/ run OK for the week post-heat exch replacement, which is why I fear that it's just an awful coincidence and the *********** PCB has given up (again).

I did wonder if the pressure switch air hose had developed a leak and tried disconnecting it and blowing/sucking into it. That allowed the boiler to light sans cover - very 'exciting'. I was so encouraged by this that I replaced the hose whilst the fan was still spinning - a less than good idea but I did manage to find the Steristrips fairly quickly!!

However, now it attemps to start (fan + ignition sequence) and then faults.

Richard

Boiler sparked up fine for about a week but has now adopted the

following mode of operation. viz: Power on, boiler stat set to maximum and tank calling for heat: fan starts running followed by ignition sparks followed by no gas and blinking red LED.

I had a similar occurrence on a Baxi SoloPF2 a couple of years ago. Th solenoid in the gas valve had gone - so check for continuity between th two solenoid terminals, as well as for 230 VAC at the solenoid pin o the PCB.

HTH

David

-- Davide