How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Brian Your Own Question
Brian
Brian, Plumber
Category: UK Plumbing
Satisfied Customers: 848
Experience:  16 yrs. experience as plumber, including full bathroom and kitchen installations.
63187465
Type Your UK Plumbing Question Here...
Brian is online now
A new question is answered every 9 seconds

Rick, thanks . I have 2 issues with a Sime

Customer Question

hi Rick, thanks for chatting. I have 2 issues with a Sime combi boiler. Issue 1:the central heating cuts out / doesn't work. The 3.5 bar pressure LED is lit (red). If I turn on nay cold water tap in the house the pressure drops to 2.5 bar and the central heating starts working!Thanks for your help. Tony. Sorry forgot to say the second issue,which may be related, is that the hot water has a brown look to it. Cold water is clear. Cheers Tony

Submitted: 2 years ago.
Category: UK Plumbing
Expert:  Brian replied 2 years ago.
Hi Tony, You could have a problem with the expansion vessel, as far as I am aware they are at the back of the boiler and you should be able to access a valve (tyre Valve) on the top of the boiler. give this a quick push if you get nothing come out it needs pumping up if you get water come out its ruptured and needs replacing. if you get air come out you will need to isolate the boiler let some off the water out so that the pressure guage is at zero and put a tyre pressure gauge on the expansion vessel valve it should read in the region of 1 bar but accurate pressure should be available in the manual.Brian