Our Highflow 400, which has had a series of problems now has a problem that Worcester Bosch have tried to fix but not succeeded. They plan to have another go, but I wondered whether anyone had some theories here.
When the central heating is not running, the boiler can deliver hot water to the taps. But with the tap still running, you can flip on the CH and the water runs cold. Turn the CH off and the tap gets its hot water back.
The heat exchanger at the back of the boiler was switched out on the last visit, but that hasn't solved the problem. It was powder flushed a couple of months back and had inhibitor added.
Thoughts anyone?
Jon
When the central heating is not running, the boiler can deliver hot water to the taps. But with the tap still running, you can flip on the CH and the water runs cold. Turn the CH off and the tap gets its hot water back.
The heat exchanger at the back of the boiler was switched out on the last visit, but that hasn't solved the problem. It was powder flushed a couple of months back and had inhibitor added.
Thoughts anyone?
Jon