Grant Combi 90 MK2 Hot Water Issue

Discussion in 'Plumbing and Central Heating' started by jg1975, 30 Nov 2021.

  1. jg1975

    jg1975

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    Hi looking for some help please? got a rental house in Ireland with above oil combi.
    Irish market doesn’t like oil combis and not the norm. I’m struggling to diagnose remotely, I don’t want to throw parts but I’m thinking diverter valve ?
    Message from tennant
    “When I have the heating on I don’t have hot water. I just tried to run a bath just now and no hot water as I had the heat on for a while! Loads of hot water when I don’t have the heat on!

    Any thoughts please diverter valve? blending valve? Micro switches ?

    thanks
     
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