T013_F: Flame Lost After Established
Status
Flame loss is not a critical fault per say. However if repeated continuous failures occur, the system will go into a one-hour lockout.
Description
After a successful ignition trial where the flame was in fact sensed, the flame signal reduced or went away. This can happen after any successful proof of ignition.
Expected Operation
When the flame that was proven is lost, the IFC will display a "13" on the seven segment LED. The blower will be energized if it weren't already and will run for the blower off period of 90 seconds. The inducer will continue to run and the ignition sequence will again take place. The fault at the EcoNet Thermostat will not be displayed unless it occurs 3 times consecutively. More often than not, if there is a flame sense problem, it will return as an 11.
Cause
The most common cause for flame sense to weaken is a dirty or corroded flame sense rod. A loss of gas supply from either a failed gas valve or from the source, such as running out of LP gas.
Solution
Clean flame sensor using steel wool or a crispy dollar bill. Do NOT use sandpaper or emery cloth to clean flame sensors. Check mounting of the flame sense rod, ensure proper furnace grounding, check for undesirable flame patterns.
