My boiler has started switching off after about a minute and a half, after a few seconds it fires up again, i've bled all rads, turned all trv's fully up and its still doing it, anything else i can check, the boiler is about 12 years old so don't want to spend to much on it, maybe coming out soon as part of house renovation. Sorry if there is any info already on here, but the search function isn't working, thanks
