I have recently had a boiler repair man out to my boiler. When the central heating is on and I run the bath I find the water going cold. Upon checking the boiler I find that the reset button is flashing red and the little spanner is also flashing red. He has replaced the diverter but this still seems to be happening. What could this be?

Jacqui L, December 2010

Yes, the heating works on its own but as soon as I run the hot water the lights start flashing again

Jacqui L, December 2010

yes

Jacqui L, December 2010

does the heating work ok on its own

b, December 2010