Recent content by JimmyRay

Thanks, The pump does get power and does work when hot is called for, but the temperature still rises quickly and reaches its switch off temperature before supplying any hot to the tap.

Hi there bit new to this. Hoping someone can help. I have just had a Vaillant 937 EcoTec Plus installed but am unable to get hot water. When i draw hot water from a tap the boiler will fire up but the temperature gauge will almost instantly race up to 80 or 90 degrees and then shut off...