What It Means
- Improper Earth Ground
- O23-5, OF23-5, OHR23-5: Cad cell resistance 400 - 800 Ohms
Lennox Ducted Heating
Lennox Ducted Heating Error Code 2
Ducted Heating
2 means different things on different Ducted Heating models. Enter your model number to see only your reading, or find your model below.
Causes & actions from Lennox
Improper Earth Ground
7 models
EL195UH, EL195UHNE, EL196UHE, ML180UHE, ML180UHV, ML193UHE, ML196UHE
How it shows
- Integrated control red LED: 2
This manual entry does not list further causes or actions.
Applicable models & manual sources
- EL195UH
Improper Earth Ground
- EL195UHNE
Improper Earth Ground
- EL196UHE
Improper Earth Ground
- ML180UHE
Improper Earth Ground
- ML180UHV
Improper Earth Ground
- ML193UHE
Improper Earth Ground
- ML196UHE
Improper Earth Ground
Cad cell resistance 400 - 800 Ohms
Models: O23-5, OF23-5, OHR23-5
Oil furnace (indoor)
How it shows
- oil r7184b cad cell test led: 2 (led1: flashing ×2)
This manual entry does not list further causes or actions.
Applicable models & manual sources
- O23-5
Cad cell resistance 400 − 800 Ohms
O23-5, OHR23-5, OF23-5
Disclaimer: This information is for general reference. Code wording and instructions vary by model. Always follow the service manual for your exact unit.
What should you check next?
Continue in ACLogics with guided diagnosis for your equipment and symptoms.
