The boiler tried to ignite four times during one heat call and failed. The red FAULT light and LOCKOUT will flash on the display. This code indicates a serious safety issue. The boiler will not restart until the cause of ignition failure is repaired by a technician and he pushes the RESET button on the display. During this lockout fault, the pump will remain on as indicated on the second line of the display.
- Watch the igniter through the observation window provided.
- If there is no spark, check the spark electrode for the proper .156” (3.96 mm) gap
- Remove any corrosion from the spark electrode and flame rectifier probe.
- If there is a spark but no flame, check the gas supply to the boiler.
- If there is a flame, check the flame sensor.
- Check any flue blockage or condensate blocks.
