Gasgeezer. Sorry I don't understand. The boiler won't fire up in the first place. All that happens is the flue fan keeps going on & off for about 1 second each time. The pilot should light when the 3 rd led lights but only 1 & 2 are lighting, which according to the manual mean there's a problem with the fan/air pressure switch/tubing or main PCB.
Saunier Duval Xeon 60FF boiler won't run. Fan Hunting?
- Thread starter Jboy
- Start date
Sponsored Links
Just look and see if the pilot is alight if it is only the neons 1 and 2 will light.If not have you put the link in terminal 9 and S/L ON THE PCB.Also recheck the wiring on the new pcb and the polarity or the wiring harness to the fan
The pilot light is not lit. It normally only lights when leds 3 & 4 on the pcb are on. The boiler isn't getting anywhere near to trying to light the pilot light it's just turning the flue fan on & off. I tried reversing the wiring to the fan and it still did the same either way round. I haven't altered any wiring since it stopped working, I've just swapped the PCB & APS wire for wire really. Just checked & link 9 is still there.
Sponsored Links
Just re-read your post, do you mean if the boiler "thinks" the pilot is lit before it starts, it won't fire up?gasgeezer said:
gas4you said:was your new pcb manufacturers original part replacement or some cheap independant look-a-like
Hmm, I see what you mean, I'm thinking more & more it's still the PCB too. It looks pretty genuine from the box. It has "Glow-worm, awb, pro-therm, Bongioanni Genuine factory replacement parts" all over it. I suppose there could be something else wrong which has Kn%$£ked up the replacement board too!
Gentlemen, thanks for all your help and for maintaining my sanity. Got the PCB swapped, they didn't seem happy, and with the second replacement pcb the boiler fired up straight away. Thanks again.
PCB - Printed Circuit Board. In this case it's the electronic circuit board in the bottom of the boiler, which controls everything it does. It's easy to swap really - Switch the power off, remove all the wires (make note of where they came from) squeeze the plastic pillar/clips and the board should pop off. If you're not very confident with electrical bits it might be best to get a mate to help who is. My replacement board cost about £70 but, as you can read above, the first one was faulty. I've spoken to people since who say these new boards have a reputation of being faulty and you can sometimes try several before you get a good one!
DIYnot Local
Staff member
If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.
Select the supplier or trade you require, enter your location to begin your search.
Are you a trade or supplier? You can create your listing free at DIYnot Local
Sponsored Links
