Need some advice. I have an ideal boiler he15 icos and the heating and hot water is off but the boiler it displays C and it keeps firing up like it’s on continually. What does that mean. Whatever I switched on last ie if I put the heating on for an hour, the heating is still on after an hour and boiler keeps firing up even though it’s off. Not sure if it’s to do with anything, but recently changed the pcb 🤷‍♀️. 


  • adonisadonis Forumite
    1.1K Posts
    Part of the Furniture 1,000 Posts Name Dropper
    I read on another forum that it could be a zone valve, but the gas guys on here may know what the problem is..
  • dunstonhdunstonh Forumite
    112.5K Posts
    Part of the Furniture 10,000 Posts Name Dropper Combo Breaker
    It would probably be better if you posted in the right section as your question is technical and appears to be related to a gas boiler.  The energy forum is where gas experts hang out.  This one is oil, LPG and alternative fuels.
    I am an Independent Financial Adviser (IFA). The comments I make are just my opinion and are for discussion purposes only. They are not financial advice and you should not treat them as such. If you feel an area discussed may be relevant to you, then please seek advice from an Independent Financial Adviser local to you.
Sign In or Register to comment.
Latest MSE News and Guides

Did you know there's an MSE app?

It's free & available on iOS & Android


Regifting: good idea or not?

Add your two cents to the discussion

MSE Forum

Energy Price Guarantee calculator

How much you'll likely pay from April

MSE Tools