Search results

  1. J

    Vaillant EcoTec 637 keeps switching off and on after 4 mins

    Hi, I have a ecotec plus 637 that swicthes off after about 4 mins, recycles and then swtiches off after about 8 to 10 mins, even though the heat demand is on all the time. Also with the water demand on it does not come on at all. The boiler has been installed for about 2 years and has had no...
Back
Top