How To Reset Furnace Lockout. The interrupted power supply clears the lockout and will. Decipher two led flashes to mean the draft blower is not working, or your furnace has a short in the pressure switch circuit.
After troubleshooting for a while, he deduced that it was probably due to a faulty circuit board, or that it could be the gas. You can press the reset button up to three times before troubleshooting the furnace's internal components or calling for repair service; If a furnace isn’t receiving enough airflow, it may overheat and trigger the reset button to trip.
Most of the time a furnace will lock out because the flame sensor needs cleaning or replacing.
If there's any water vapor in your tank, it will freeze and can block the outlet. What does lockout mean on furnace? Can you bypass furnace limit switch? To reset from hard lockout press and hold the “i” button for 2 seconds.