What It Means
- PA Filter Life At 10%
Lennox Equipment not specified
Lennox Error Code 503
Equipment not specified:
Causes & actions from Lennox
How it shows
- iComfort S30 alert: 503
Priority condition: Service Soon Filter life remaining determined to be <=10%, but greater than 0%.
Applicable models & manual sources
- iComfort S30
PA Filter Life At 10%
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.
