Lennox · PRODIGY 2.0 Unit Controller
This alarm code indicates that the unit controller did not detect the gas valve being energized within two minutes after a heating demand was initiated for gas heat section 2.
Click steps to track your progress.
Ensure there is a valid heating demand for section 2.
Check the wiring to the gas valve for section 2.
Verify that the gas valve for section 2 is receiving power.
Test the gas valve for section 2 for proper operation.
Contact a technician if the issue persists.