The flame was lost 3 times while the boiler was firing during 1 demand call. This is a serious safety issue as indicated by the illuminated red light and the word LOCKOUT flashing on the display. The boiler will not restart until a technician determines and repairs the cause of flame loss and pushes RESET on the display. During this lockout fault, the pump will be on.
- Monitor gas pressure to the unit while in operation.
- Assure the flame is stable when lit.
- Check if the display readout changes from “GAS VALVE ON” to “RUN” within a few seconds of boiler ignites.
- Check the FLAME signal on the display. It should be above 1.0 when the boiler is firing.
- If the signal reads less than 1 microampere, clean the flame rectifier and spark probe.
- If the problem persists and the ‘FLAME” signal is still less than 1.0, replace the flame probe and spark igniter probe.
- The flame signal should be steady after the boiler has been firing for 1 minute and is normally at 5.0 to 9.0. If the flame signal is not steady, disassemble the burner door and check the burner and its sealing gaskets.
