Recent content by apexlets

Thanks guys -- I will put your suggestions to the engineer and see if he will come back out (without a repeat visit charge) to check your suggestions for the fault. He is an approved Vaillant service engineer so I would have thought he would have known to check for those things but I guess...

Thanks Aigle and Boilerman2 for your input. The boiler model is VUW282E and does not have a diagnostic display - sorry for missing that out on my original post ! The pump runs fine at pre burner ignition even when the boiler is cold so I guess its not dirt ! The gas valve seems to...

I have a Vaillent turbomax combi that goes to lock out on first start up from cold either on heating demand or hot water demand. Once manually fired up it will continue to stay on while heat is called for on the timer. In other words it only goes to lock out when system is cold. The system was...