I have a Glow-worm condensing combi boiler (can't remember the exact
model number), and recently it has decided to stop heating water
occasionally. For example, you switch the shower on (it is a shower
connected to the boiler and not an electric one!) and leave it running
for a few minutes. After the first couple of minutes, the water goes
stone cold for about a minute and then starts heating up again. The
cycle seems to repeat itself as well.
I've tried using the taps instead of the shower and the problem is
still the same.
Any suggestions would be appreciated.