What It Means
- OD Control Board Low 24VAC
Lennox Equipment not specified
Lennox Error Code 409
Equipment not specified:
Causes & actions from Lennox
How it shows
- iComfort S30 alert: 409
Priority condition: Service Soon The secondary voltage for the applicable system component has fallen below 18VAC. This may be due to: • Secondary voltage is below 18VAC. • If this continues for 10 minutes, the thermostat will turn off the applicable system component.
Applicable models & manual sources
- iComfort S30
OD Control Board Low 24VAC
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.
