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Shower cold when heating on.

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  • air lock in the hot supply to the shower or faulty or scaled up thermostat in the shower
    I'm only here while I wait for Corrie to start.

    You get no BS from me & if I think you are wrong I WILL tell you.
  • keystone
    keystone Posts: 10,916 Forumite
    air lock in the hot supply to the shower
    that is indeed possible with the cylinder in the roofspace as OP reports. With a short vent pipe there is the distinct possibility of air being drawn into the vent but OP hasn't replied on how the shower is piped yet.
    or faulty or scaled up thermostat in the shower
    but how would that account for the shower temp being fine with heating off but not fine with heating on? Could well be contributory I agree but not convinced that, if present, its the only problem.

    Good spot on age of backboiler (another 5 mins on the naughty step for me for not paying attention - where are you Cy? :D) but history that OP has briefly hinted at suggests there could well be a pile of stuff wrong with this system which only adds to my feeling that this is only resolvable hands on in the property.

    Cheers
    The difference between genius and stupidity is that genius has it's limits. - Einstein
  • poet123
    poet123 Posts: 24,099 Forumite
    I don't know how the shower is piped, sorry.

    The original installer put the flow and return pipes the wrong way round, which meant we only got hot water when the heating was on. He was a subcontractor from the firm who fitted the fireplace and took our money and ran.... The fireplace co had to pay up for his errors in court.

    The firm who resolved the issue were very good so I don't think it is a residual issue and we have had no issues for 8 years.
  • keystone wrote: »
    but how would that account for the shower temp being fine with heating off but not fine with heating on? (another 5 mins on the naughty step for me for not paying attention

    oh boo hiss move over then there must be room for two on that step :o
    I'm only here while I wait for Corrie to start.

    You get no BS from me & if I think you are wrong I WILL tell you.
  • keystone
    keystone Posts: 10,916 Forumite
    poet123 wrote: »
    I don't know how the shower is piped, sorry.
    Oh well no worries.
    The firm who resolved the issue were very good so I don't think it is a residual issue and we have had no issues for 8 years.
    Fair point. Trouble is we can't see it and feel it from his side of the interwebz so it makes diagnosis quite difficult unless its as obvious as a trunk on an elephant.

    Cheers
    The difference between genius and stupidity is that genius has it's limits. - Einstein
  • keystone
    keystone Posts: 10,916 Forumite
    oh boo hiss move over then there must be room for two on that step :o
    NO. Its all mine. Anyway - people will talk. :D:D

    Cheers
    The difference between genius and stupidity is that genius has it's limits. - Einstein
  • sod you then, i'm off to shegirl's soundproofed room :D
    I'm only here while I wait for Corrie to start.

    You get no BS from me & if I think you are wrong I WILL tell you.
  • keystone
    keystone Posts: 10,916 Forumite
    I'll tell. :p
    The difference between genius and stupidity is that genius has it's limits. - Einstein
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