Vaillant Turbomax 824 overheats very quickly in heating mode?

My Vaillant Turbomax 824e overheats in heating mode all of a sudden after 12 years working fine... I replaced pump as advised then fitted new bypass after talking to Vaillant helpline... Hot water works fine... Please help!!!

Possit14
February 2012

Vaillant Vaillant 824e Bathroom Appliances, Baths and Showers

Assuming you have a Turbomax + (rather than the old VUW). It sounds like the diverter valve isn't opening to the CH position

Carefree
March 2012

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Vaillant Turbomax 824 overheats very quickly in heating mode?

Vaillant Turbomax 824 overheats very quickly in heating mode?

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Vaillant Turbomax 824 overheats very quickly in heating mode?

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