My Baxi boiler Instant 105 HE seems to come on to central heating even when the timer is not set to do so? It does this at random times, any ideas why or what i can do to stop it ?

Thanks
Melissa

Melissa, June 2008

Sorry not sure what you mean, why would the radiators come on just because the hot water is being heated? it hasnt done this before and heats the water without the radiators when it is set to hot water only.
Surely if the timer is not set for it to come on , the heeating shouldn't come on ??

Melissa, July 2008

is it not just the preheat function selected for hot water????????

iain, June 2008