This display indicates that there is excessive flue pressure. This code resets automatically after the high pressure condition is resolved. The sec-ond line indicates the status of the pump.
- Assure that the flue is not blocked.
- Check the switch wiring by applying a jumper in place of the switch. If the code clears with the jumper in place, REPLACE the flue switch and connect the wires to the new switch BEFORE running boiler.
WARNING: Do not use jumper to remedy an FLU error. Faulty switch MUST be replaced. Failure to do so could result in serious injury or death.
