Lennox Select Equipment
Lennox Error Code 3 Flashes
3 Flashes means different things on different Lennox equipment. Choose the equipment you are working on.
Disclaimer: This information is for general reference. Code wording and instructions vary by model. Always refer to your unit's service manual.
What does it mean? Select your equipment
- Ducted Heating Unit heater (indoor) Burner failed to light, or lost flame during heat demandCombustion Air Prove Switch OpenPressure switch open with combustion air inducer energized. + 3 more readings->
- Packaged Unit Packaged HVAC (indoor), Packaged HVAC (outdoor) Ignition lockout from too many trials.Pressure Switch open with CAI ON->
What should you check next?
Continue in ACLogics with guided diagnosis for your equipment and symptoms.
