Results 1 to 10 of 10
Plumbing & Plumbers Forum - Radiators getting hot when hot water tap is run

Radiators getting hot when hot water tap is run

Discuss Radiators getting hot when hot water tap is run at UK Plumbers Forums; Maybe it's todays blistering heat that's making me finally ask about this. As the post title says, all of the radiators (upstairs and downstairs) in my house get hot (fully ...
  1. #1
    whiterz
    Guest

    Thumbs down Radiators getting hot when hot water tap is run

    Maybe it's todays blistering heat that's making me finally ask about this.

    As the post title says, all of the radiators (upstairs and downstairs) in my house get hot (fully hot!) when the hot water tap is run. The longer the tap is run for the hotter they get, but it never takes too long to get them steaming.
    I just want to say that where plumbing is concerned I know next to nothing... so its hard for me to supply any relevant details without being prompted first. However I guess the make of my boiler might be useful to someone? It's a BAXI Combi 105e.

    If someone could give me some kind of idea of whats going on? I'm certainly no expert but it seems extremely abnormal to me! .

    Thanks! - whiterz

    (p.s. Hi everyone, I'm new here)

  2. #2
    Member
    Join Date
    Apr 2010
    Posts
    838
    Thanks
    0
    Thanked 33 Times in 32 Posts

    Default Re: Radiators getting hot when hot water tap is run

    My first guess would be the diverter valve gubbings aren't moving properly in hot water demand, probably due to dirt choking it up.

    Fix....

    Remove gubbings and clean or just replace gubbings.

    also fit magnaclean to protect from future choking

  3. #3
    whiterz
    Guest

    Default Re: Radiators getting hot when hot water tap is run

    Quote Originally Posted by Mbear View Post
    My first guess would be the diverter valve gubbings aren't moving properly in hot water demand, probably due to dirt choking it up.

    Fix....

    Remove gubbings and clean or just replace gubbings.

    also fit magnaclean to protect from future choking
    Ahhh that sounds like a pretty good guess to me because we had alot of problems with the build up of iron oxide sludge in the past. Thanks .

    Would the whole system have to be drained and flushed out (i.e. radiators taken off the walls and washed out etc.) prior to fitting a Magnaclean or would the Magnaclean be sufficient by itself?

  4. #4
    Member
    Join Date
    Apr 2010
    Posts
    838
    Thanks
    0
    Thanked 33 Times in 32 Posts

    Default Re: Radiators getting hot when hot water tap is run

    I don't know if I can comment without seeing it mate, once the dv gubbings are replaced you'll have a better idea when you see the condition of it.

    But powerflush and magna sounds like it would really help you.



    magnafilter will be sufficent after it's been flushed
    Last edited by Mbear; 23-05-2010 at 07:47 PM.

  5. #5
    uɐɯ sɐƃ moderator



    gas man's Avatar
    Join Date
    Jan 2010
    Location
    maesteg,south wales,land of MTB
    Posts
    18,661
    Thanks
    1,166
    Thanked 1,798 Times in 1,696 Posts

    Default Re: Radiators getting hot when hot water tap is run

    classic knackered divertor valve
    fear keeps you alive
    fearless gets you killed

    I have a banning hammer and I am not afraid to use it

  6. #6
    whiterz
    Guest

    Default Re: Radiators getting hot when hot water tap is run

    Purfeck. Thanks guys that's all I needed to know

  7. #7
    uɐɯ sɐƃ moderator



    gas man's Avatar
    Join Date
    Jan 2010
    Location
    maesteg,south wales,land of MTB
    Posts
    18,661
    Thanks
    1,166
    Thanked 1,798 Times in 1,696 Posts

    Default Re: Radiators getting hot when hot water tap is run

    Quote Originally Posted by whiterz View Post
    Ahhh that sounds like a pretty good guess to me because we had alot of problems with the build up of iron oxide sludge in the past. Thanks .

    Would the whole system have to be drained and flushed out (i.e. radiators taken off the walls and washed out etc.) prior to fitting a Magnaclean or would the Magnaclean be sufficient by itself?
    you would need a full descale rads off etc
    fear keeps you alive
    fearless gets you killed

    I have a banning hammer and I am not afraid to use it

  8. #8
    Member

    Join Date
    Nov 2009
    Posts
    525
    Thanks
    2
    Thanked 24 Times in 24 Posts

    Default Re: Radiators getting hot when hot water tap is run

    Magna clean is an 'as well as' a flush, not 'instead of', unfortunately your system can be flushed but not a combi with diverter valve, could damage it.

  9. #9
    oldplumber
    Guest

    Default Re: Radiators getting hot when hot water tap is run

    Quote Originally Posted by Mbear View Post
    My first guess would be the diverter valve gubbings aren't moving properly in hot water demand, probably due to dirt choking it up.

    Fix....

    Remove gubbings and clean or just replace gubbings.

    also fit magnaclean to protect from future choking
    bet your popular with the parts center counter staff, asking for a gubbings on a busy monday morning

  10. #10
    Member
    Join Date
    Apr 2010
    Posts
    838
    Thanks
    0
    Thanked 33 Times in 32 Posts

    Default Re: Radiators getting hot when hot water tap is run

    Quote Originally Posted by oldplumber View Post
    bet your popular with the parts center counter staff, asking for a gubbings on a busy monday morning
    sorry that's just what I call it when talking about these kinda bits with boys in work Hehe! I'm pretty sure it's the alpha 710 seal kit that u would buy for this dv. I'm positive baxi don't do such a kit. The alpha kit fits it.

Everybody loves a good deal: Deals and Discounts on Dozens of Powertools!
Everybody loves a good deal: Deals and Discounts on Dozens of Powertools!

Similar Threads

  1. Radiators still running water
    By Fontanero in forum Plumbing Forum
    Replies: 17
    Last Post: 26-09-2013, 06:46 PM
  2. radiators ok,but only hot water when ch is set to off
    By brucieboy in forum Central Heating Forum
    Replies: 4
    Last Post: 23-01-2013, 06:56 PM
  3. No Hot water, Radiators fine - Diverter?
    By toma80 in forum Central Heating Forum
    Replies: 1
    Last Post: 20-11-2012, 01:58 PM
  4. No hot water/Hot radiators
    By camerart in forum Central Heating Forum
    Replies: 20
    Last Post: 17-06-2012, 05:51 PM
  5. No hot water unless radiators on
    By chemistpm in forum Central Heating Forum
    Replies: 9
    Last Post: 05-06-2012, 06:27 PM
  6. No hot water but Radiators OK
    By malcmw in forum Central Heating Forum
    Replies: 9
    Last Post: 11-01-2012, 05:12 PM
  7. Draining and hot water system via radiators
    By jiffter in forum Plumbing Forum
    Replies: 2
    Last Post: 15-03-2011, 11:05 PM
  8. Can't put hot water on without putting radiators on.
    By nelster in forum Central Heating Forum
    Replies: 4
    Last Post: 26-10-2009, 07:57 PM
  9. Radiators getting hot, but no hot water
    By Ruggy1980 in forum Central Heating Forum
    Replies: 6
    Last Post: 20-05-2009, 10:12 PM

Visitors found this page by searching for:

radiators get hot when running hot water

why do my radiators get hot when i run hot water

radiators get hot when hot water on combi

radiators get hot when running bath

radiators getting hot when hot water on combi boiler

Tags for this Thread


Try our Talk Electrician Forum and our popular Tilers Forums for more free advice from professional tradesmen.
Tens of thousands of tradesmen and over 2 million combined posts.


Plumbers Forums is a community-driven forum shared between all members.