831

Hi All, Just to say I am a end user not plumber. Have a problem with the hot water. It intermitantly runs tepid. About 3 months ago I had the Diverter valve changed as I had no hot water at all. Since then I have had tepid water intermittently. I happens mostley first thing in the morning. The...

Hi All, I've tried to look for this question in the forums and some are close but don't seem to be exactly what I have. I am trying to wire a bh3000 thermostat to an 831 vaillant boiler. I have two wires from the wall (brown and blue) + earth. I have connected the two wires from the...