1. Visiting from the US? Why not try DIYnot.US instead? Click here to continue to DIYnot.US.
    Dismiss Notice

Immersion Heater doesn't heat enough hot water

Discussion in 'Plumbing and Central Heating' started by rollin, 14 Jan 2006.

  1. rollin

    rollin

    Joined:
    14 Jan 2006
    Messages:
    11
    Thanks Received:
    0
    Country:
    United Kingdom
    I live in an apartment that is heated with electric storage heaters and has an immersion heater for hot water.

    The make on the hot water cylinder is Gledhill. It heats up water on economy 7 and can also be switched on via another switch on the wall next to it.

    Recently its started to not supply a great deal of hot water before running cold (about a quarter of a bath).

    When the hot water runs out, I switch on the over ride circuit but no matter how long it is switched on for, it only gives out a small amount of hot water and then runs cold again. This happens even though I can hear that the water is being heated ( sounds like a kettle).

    Can anyone tell me the cause of this problem and give an indication of how much it will cost to fix.

    Thanks
     
  2. Sponsored Links
  3. breezer

    breezer

    Joined:
    3 Jan 2003
    Messages:
    23,324
    Thanks Received:
    30
    Location:
    Sussex
    Country:
    United Kingdom
    probably needs new element or stat or both, cost, no idea what so ever, best get several quotes
     
  4. Paul Barker

    Paul Barker

    Joined:
    4 Aug 2005
    Messages:
    13,781
    Thanks Received:
    2,297
    Location:
    Yorkshire
    Country:
    United Kingdom
    The cylinder might have two in if the bottom one has gone you would get a basin of hot water.
     
  5. kevplumb

    kevplumb

    Joined:
    18 May 2004
    Messages:
    23,712
    Thanks Received:
    925
    Location:
    depends where i get sent
    Country:
    United Kingdom
    pound bet paul

    the bottom imm is shot :LOL: :LOL: :LOL:
     
  6. rollin

    rollin

    Joined:
    14 Jan 2006
    Messages:
    11
    Thanks Received:
    0
    Country:
    United Kingdom
    The cylinder does have 2 heaters.

    As I've said above, when I switch on the 24hr option I can hear the water heating up. I can also hear it heating up when the economy 7 kicks in (24 hour option switched off)

    Am I right in thinking that one of the elements is for economy seven and the other for the 24hr over ride?

    In which case both seem to be heating, but not enough water.

    If one of the heaters has broke, is it easy to change?

    Thanks for the help so far.
     
  7. Sponsored Links
  8. kevplumb

    kevplumb

    Joined:
    18 May 2004
    Messages:
    23,712
    Thanks Received:
    925
    Location:
    depends where i get sent
    Country:
    United Kingdom
    in a word no
    not easy but not impossible
    the biggest prob i have is getting the herberts to come out
    after you isolate and drain the cylinder :cry:
     
  9. Paul Barker

    Paul Barker

    Joined:
    4 Aug 2005
    Messages:
    13,781
    Thanks Received:
    2,297
    Location:
    Yorkshire
    Country:
    United Kingdom
    Many times the drain off is at the far back corner and stuck. We are always having to put a length of 15mm pipe down the draw off hole (after first isolating header tank with gate valve if you're lucky, I don't usually even try them just bung the tank as a matter of course, and run hot tap 'till water stops flowing) hose on end of pipe suck for England to start it siphoning. Wait about 1/2 houyr to 1hour for it to drain, when it's drained put new drain off in place you can get to it. Get you immersion spanner, box type is best as you can brace it both sides equilateraslly and so not kink the cylinder.

    When puting new immersion in don't overtighten or fibre washer splits, nip it up after you refil until it is just so, if a slight weep it should settle, overtightening is worst thing to do, end up with big leak, undertightening start with slight weap end up with dry joint. (In electrics we don't like dry joints, in plumbing we do)

    Bound to be your bottom immersion.

    Should have gone to speck savers.
     
  10. kevplumb

    kevplumb

    Joined:
    18 May 2004
    Messages:
    23,712
    Thanks Received:
    925
    Location:
    depends where i get sent
    Country:
    United Kingdom
    :LOL: :LOL: :LOL: :LOL: :LOL: :LOL: :LOL: nice one ;)
     
  11. bab

    bab

    Joined:
    31 Dec 2005
    Messages:
    873
    Thanks Received:
    7
    Location:
    Lancashire
    Country:
    United Kingdom
    before changing the immersion if u know what u are doin u should check that the bottom immersion hasent got an overheat stat thats tripped or if the thermostat is faulty or if u even have 240 volts there during off peak times at the immersion. Iv even been to immersions claimed to be faulty that have the isolation switched off. NEVER asume anything.
     
  12. DIYnot Local

    DIYnot Local

    Joined:
    3 Sep 2019
    Country:
    United Kingdom

    If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

    Select the supplier or trade you require, enter your location to begin your search.


    Are you a trade or supplier? You can create your listing free at DIYnot Local

     
Loading...

Share This Page