Just got a new bathroom suite fitted, and part of the work involved
replacing the old lead hot pipes with plastic. Boiler is a Vokera Linea
24 combi. Now I'm finding that the hot water is fluctuating in
temperature whereas before it was steady. Every minute or so the
temperature drops by about 8 degrees, which I can see happening on the
temperature display on the boiler and I can hear the flame going off.
Any idea what's up?