Hi,
I have a problem that affects both my Hot Water and Central Heating. When either or both of them are switched on from cold manually or by the timer the radiators and water only become mildly luke warm. If I wait 10 minutes and then switch them off and then immediately back on again both the radiators and the water heats up correctly. The issue is always repeatable and needs the initial first 10 minutes on time before the switch off/on can happen otherwise they do not heat up correctly on the second switch on.
Any ideas?
Jeff
