Hi
I have a Baxi Duo-tec HE24 condensing boiler fitted in September and lately
it has shut itself down for no apparent reason and shows error code E125. I
try to reset it but this doesn't usually work and instead I have to switch
off the boiler and turn it on again before it'll work. It's been happening
more frequently lately and although it's still under warranty I was hoping
that someone can give me an idea of what's the problem before I call out the
installer. According to the users book it says the error code 125 may be due
to a fault in the primary circulation or due to a blockage.

TIA
Phil