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 Andrew Smith Your Own Question

Andrew Smith
Andrew Smith, Plumber
Category: Home Improvement
Satisfied Customers: 3591
Experience:  City and Guilds Qualified plumber
46681511
Type Your Home Improvement Question Here...
Andrew Smith is online now

Cold radiators new system

Customer Question

Help... I've got a new central heating system and it was working perfectly. Just had a new bathroom fitted, including a heated towel rail. Now 2 of my radiators will not heat up at all! They are stone cold as are the pipes leading to them.
Tried all the obvious stuff, bleeding, turning the hot ones off, draining and then refilling. Still no joy.
The two that aren't working are directly above/below each other. Even my builder couldn't work out what's wrong.
Any advice/ideas please?
They aren't on a separate circuit
Submitted: 1 year ago.
Category: Home Improvement
Expert:  Andrew Smith replied 1 year ago.
It sounds like they are airlocked.What happens if you turn the pump up and turn all the other radiators off?
Customer: replied 1 year ago.
I've tried turning all the other rads off and just leaving the 2 "broken" ones on. Not sure what you mean by pump? My builder put a pipe on one to drain it while leaving the tap on to refill the system... Is that what you mean?
Expert:  Andrew Smith replied 1 year ago.
Is the circulating pump in the boiler or in the airing cupboard?
Do you have a cylinder?
Customer: replied 1 year ago.
It's an Elnur electric combi boiler. I have no tanks.
Expert:  Andrew Smith replied 1 year ago.
You need to check the pump speed and turn it up if you can.The pump is in the boiler
Expert:  Andrew Smith replied 1 year ago.
http://www.elnur.co.uk/Elnur-UK-Products/electric-boilers/electric-combi-boilers.html
Customer: replied 1 year ago.
Ok, I've taken the front off the boiler and locatedthe pump. It has a slot on the control that needs to be turned with a screwdriver.
How do I do this though? Is it best to have the boiler turned off, or heating on etc. How much should I turn it? Can it be on too high and cause damage?
Expert:  Andrew Smith replied 1 year ago.
You can adjust the speed with the power on.
Turn it up one and then try turning all the rads off again except the faulty one and see if it will force through
Customer: replied 1 year ago.
There are two controls on the pump, the turny slot thingy and a black lever.
Not sure how to attach a picture. There aren't any numbers on the dial. How much do I turn it? Can I do any damage if I get it wrong? The manual seems to talk about water coming out?
Expert:  Andrew Smith replied 1 year ago.
Water will only come out of the centre screw.You are looking for a slot near the electrical connection http://www.elnur.co.uk/Elnur-UK-User-Manuals/electric-combi-boilers-and-system-boilers-user-manual.pdf
Customer: replied 1 year ago.
Ok, so if you look at the diagram in figure 5.3... Which bit should I be turning? Or below the stuff shown in the diagram is a black knob with "3 bar" on it... Is that what you mean?
Expert:  Andrew Smith replied 1 year ago.
The bit with 3 bar on is the PRV, dont touch that.5.3 shows it on the left hand side of the pump on the cover
Customer: replied 1 year ago.
Ok, that's the black lever. It was in the fully down position. It will only allow me to more it up a very small a,punt before cutting out and showing fault E3
Expert:  Andrew Smith replied 1 year ago.
That is insufficient flow rate, you will need to turn it back up again
Customer: replied 1 year ago.
So in the down position it is already set at the hardest flow? So that isn't the issue?
Expert:  Andrew Smith replied 1 year ago.
No does not look a likely cause.It appears like we have done all we can via this medium, you will need to call an engineer to cure this.

What Customers are Saying:

 
 
 
  • You did one super job of explaining to me everything there is to know about this fridge. I'm looking forward to asking you questions in the future. Jimmy
< Previous | Next >
  • You did one super job of explaining to me everything there is to know about this fridge. I'm looking forward to asking you questions in the future. Jimmy
  • Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C.
  • This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!! Alex
  • Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult. GP
  • I couldn't be more satisfied! This is the site I will always come to when I need a second opinion. Justin
  • Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around. Esther
  • Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C.
 
 
 

Meet The Experts:

 
 
 
  • Plumberpro

    Plumberpro

    Plumber

    Satisfied Customers:

    40
    Fully qualified plumbing , heating and gas engineer 20 years experience
< Last | Next >
  • http://ww2.justanswer.com/uploads/PL/Plumberpro/2014-6-23_6520_image.64x64.jpg Plumberpro's Avatar

    Plumberpro

    Plumber

    Satisfied Customers:

    40
    Fully qualified plumbing , heating and gas engineer 20 years experience
  • http://ww2.justanswer.com/uploads/MA/MarkAYng/2011-1-15_16358_Markcameo2008b.64x64.jpg MarkAYng's Avatar

    MarkAYng

    Handyman

    Satisfied Customers:

    0
    Knowledgeable in home, electrical and small appliance repair.
  • http://ww2.justanswer.com/uploads/AS/AssuredElectrical/2011-9-13_221243_me.64x64.gif AssuredElectrical's Avatar

    AssuredElectrical

    Home Improvement Enthusiast

    Satisfied Customers:

    332
    Electrical contractor's license
  • http://ww2.justanswer.com/uploads/WI/WireitUp/2012-6-17_18212_Photo00006.64x64.jpg Jason's Avatar

    Jason

    Electrician

    Satisfied Customers:

    110
    Full time electrician in the USA for over 20 years. Verified USA JustAnswer Electrical Expert for approximately 7 years.
  • http://ww2.justanswer.com/uploads/AM/amesnch/2016-12-2_8571_jamesski.64x64.jpg JamesI's Avatar

    JamesI

    Developer

    Satisfied Customers:

    54
    I have a portfolio of renovated houses, including DIY projects from installing bathrooms and new heating systems to rewiring.
  • http://ww2.justanswer.com/uploads/FI/fixer2013/2013-7-25_141045_myalbumsspare029.64x64.jpg fixer2013's Avatar

    fixer2013

    Handyperson

    Satisfied Customers:

    43
    I am able to supply most answers for DIY projects, as I have many years experience
  • /img/opt/shirt.png KevinWhiteJA's Avatar

    KevinWhiteJA

    Home Appliance Technician

    Satisfied Customers:

    11
    Worked on Appliances for more than 15 years
 
 
 

Related Home Improvement Questions