Hmmmm

Newly installed boiler working fine for heating but when hot tap is run, after tap is closed boiler goes to d1 and seems to 'reset'. Takes a couple minutes and then all is fine again.

Strange - anyone have an idea ?? The mains water pressure is quite high (2+ bar), could this be the cause.

Steve

Steve Rayment, December 2008

Thanks Guys - further research tells me that the time period can be adjusted from the standard 2 minutes down to 30 secs but I don't know how.

Any ideas ??

Steve

Steve, December 2008

d1 is the delay from hot water back to heating. normally takes approx 2 minutes to fire up.its part of the settings on the boiler to stop the stats overheating.

stuart PRIESTLEY, December 2008

Hi Steve, this code is quite normal, the "d1" code is not a fault code, it is letting you know it is in "delay" mode for three or four minutes before re-igniting the heating. Most, if not all boilers have this "anti-cycling" feature. You may also see a "d2" code, for the same reason.

Scott, December 2008