I have recently had installed a Worcester Bosch Highflow 400 combi boiler and have noticed that when a cold tap is run in the house the boiler HW demand indicator lights briefly. Has anyone else noticed this. I assume it's due to the drop in pressure on the cold water inlet fooling the boiler into thinking there's been a demand for hot water - the hot water demand is detected by a flow turbine in the cold water inlet so maybe it runs backwards enough to trigger the boiler? Anyone else experiencing this. The Worceseter technical helpline thought that my explananation was unlikely but I can't think what else it can be.
- posted
20 years ago