I have recently had an electrician change the Main fuse box and he has been turning on and off main electricity.
I have not turned the boiler off while he is doing the work that (which I probably should have done), now the boiler has stopped working : I get the slow flashing blue light and the reset button is flashing red.
I re-set it few time with no success, it restarts but then does a gurgling noise and locks again.
Has anyone some advice , W.Bosch offices are closed now until Monday.
Any ideas?

Farouk, March 2009

Yes it gurglkes if restarted few times and slightly before it stops working.
When it stoppes for few hours and restarted again it will work for few min (20min ca) and locks again.

Th blue light flashes on and goes off after 3 seconds.
The guage pressure is between 1.5-2
The condense drain white pipe was reconnected to a a different point in the bathroom drainage after a new bathroom (up-stairs landing same floor as the boiler) was put in place a week ago. It is not going outside. I have though about that but since all pipes were reconnected boiler worked for days.

Farouk, March 2009

It gurgles?

OK, what's the pressure gauge reading?

I take it that the blue light is flashing slowly, being more off than on.. This means "ignition lockout".

Also check the condense drain on the boiler, this will be a 22m white pipe, the only white plastic one coming from below the boiler. It will either run outside into a soil stack or a soakaway, or it will join into a sink or bath waste inside. If this drain pipe is blocked (happens a lot in winter, the outdoor ones freeze if not lagged) then the boiler will go to ignition lockout and - classic sign this - gurgles when it tries to fire.

Bunslinger, March 2009