No flame detected after three ignition attempts.
1. Check correct gas supply pressure. If the gas supply pressure is incorrect, it must be adjusted to the correct pressure.|
2. Check ignition spark. If spark is not present, check for correct ignition ectrode position and gap. If position is correct, check for 120Vac at the supply of the spark generator.
3. Check correct combustion air pressure. If the combustion air pressure is incorrect, inspect the vent system and eliminate any obstructions.
4. Check 120Vac at the gas valve. If the voltage to the gas valve is not 120Vac the power control board must be replaced.
5. Check resistance of the two gas valve coils should be 0.18 kohm and 1.1 kohm. if the resitance of the gas valve coils is not 0.18 kohm and/or 1.10 kohm, the gas valve must be replaced.
6. Check If the burner lights, but goes out at the end of the ignition attempt, check: that the ionization current is set at a value greater than 60. If the ionization current is not greater than 60, confi rm that the the CO2 content is adjusted properly. Check the fl ame detection electrode and if necessary replace it, check the integrity of the flame detection electrode electrical wires.
