There's no hot water from the taps anywhere in the house, but shower is ok. The heating system doesn't work, either. When i reset, and then turn on the hot water tap, the green light showing burner on indicator is flashing, finally turned into red light showing boiler shut down warning. What's the problem?

Jack, September 2008

could be the flame sense electrode is dirty, burner ignition pressure wrong, flue venturi blocked partially, or air pressure switch faulty

dave, September 2008