Hi Guys,
Had a question about a S plan system. When customer turns on a hot water tap the boiler gets demand for heating as well and radiators heat up, the heating radiator sign (Vaillant Boiler) flashes on the boiler display screen.
Customer has said it has been like this for a year.
I have checked the 3 port valve and the spindle is totally free, when there is demand for heating with hot water tap on and also just when the heating is running on it's own.
Would I be looking at a faulty motorised valve head?
Had a question about a S plan system. When customer turns on a hot water tap the boiler gets demand for heating as well and radiators heat up, the heating radiator sign (Vaillant Boiler) flashes on the boiler display screen.
Customer has said it has been like this for a year.
I have checked the 3 port valve and the spindle is totally free, when there is demand for heating with hot water tap on and also just when the heating is running on it's own.
Would I be looking at a faulty motorised valve head?