Lennox Select Equipment
Lennox Error Code 3
3 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
- Split & Multi-Split Air handler (indoor), Heat pump (outdoor) Incompatible sensor typeShort Cycling - Compressor is running only brieflyCompressor drive module AC input over current->
- Ducted Heating Oil furnace (indoor) Burner failed to light, or lost flame during heat demandCad cell resistance 800 - 1600 Ohms->
- Packaged Unit Packaged HVAC (outdoor) Incompatible sensor installedProve switch open or closed or rollout switch open.->
What should you check next?
Continue in ACLogics with guided diagnosis for your equipment and symptoms.
