Lennox Select Equipment
Lennox Error Code E403
E403 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 LSOM - Compressor short-cycling (Running less than 4 minutes).LSOM - Compressor short-cycling. .(Running less than 4 minutes). Outdoor unit pressure trip->
- Split & Multi-Split Air handler (indoor), Mini-split unit (outdoor) Compressor short-cycling - running less than four minutes.Compressor down due to freeze protection control->
- VRF / VRV VRF indoor unit (indoor) 12. The compressor stops due to freeze detection (6th detection)->
What should you check next?
Continue in ACLogics with guided diagnosis for your equipment and symptoms.
