F11 Fault Code - False Flame Signal
HTP: Fault Code F11: FALSE FLAME: There is flame when the control is not telling the boiler to run. The red light will display and the word LOCKOUT will flash. This code indicates a serious safety issue. The boiler will not restart until the cause is determined by a technician and he pushes the RESET button on the display. During this lockout fault, the pump will be on as indicated on the second line of the display.
1. Look into window. If there is flame, turn the gas off to the boiler at the service valve and replace the gas valve.
2. If the flame signal on the status menu is greater than 1.0 when the burner is not lit, replace the spark igniter and the flame rectification probe.
3. If the flame return sensor is not present after turning off the gas supply, check the gas valve elec-trical connection.
4. Repair condensate system as necessary. If condensate has backed up and partially filled the combustion chamber, the refractory wall may be damaged and should be replaced.
5. Turn the gas on at the service valve after corrective action is taken.
6. If the refractory wall falls against the rectifier probe, it may conduct the signal to ground, giving a false reading.
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