Glowworm 30sxi. We had the water turned off to install new bathroom taps. Water was turned on and all seemed ok but after plumber left boiler started failing. First F5 but after resetting got hot water no rads. Then nothing. The pump's working but everythings running either cold or overheating if I turn the temp setting up.
Its possable that by draining the system you have got an air lock in the heat exchanger this can cause the boiler to lock out also check that the heating valves have been open`ed under the boiler
jts plumbing, September 2009
F5 is an overheat fault. Did the plumber drain the heating system? Just turning off the water supply should not cause this problem unless it was drained.
