leaking combi boiler Help and information on all topics relating to your central heating, air conditioning and ventilation issues.

[stevep44]

I have a main 24 he combi boiler which has a leak. the water appears to be travelling passed the fan then floods the burner & eventually blows the pcb ( i have already replaced 2 pcb's ), anyone got any clues why this maybe happening, it's really annoying, cheers.

[Steve the gas]

2 PCBs 'cos water and leccy don't get on well, get the leak sorted.

[htg engineer]

Repair the leak - lol


The fan is at the top of the boiler, above any water connections, so it is rain water ? or is there an overflow above the flue (outside) that could be leaking - running down the wall and in the flue ?


Vertical or horizontal flue ?


htg

[stevep44]

[quote="htg engineer"]Repair the leak - lol


The fan is at the top of the boiler, above any water connections, so it is rain water ? or is there an overflow above the flue (outside) that could be leaking - running down the wall and in the flue ?


Vertical or horizontal flue ?


it's a horizontal flue, i think the water maybe coming from the secondary heat exchanger (think that's what it's called) which is connected to the fan.

[DEEARR2]

There is a possibility that this may be condensate. Check the condensate flow path is clear through the boiler leading to the trap.

[gisago]

Is it sorted yet? You need to get the flue seals checked. If condense is leaking from inner flue into outer flue (air intake) and into boiler it may be a bad or damaged seal, wouldnt be the first time.