What It Means
- Primary or secondary limit switch open. Limit must close within 3 minutes or unit goes into 1-hour Watchguard.
Lennox Ducted Heating
Lennox Error Code DS1 SLOW FLASH, DS2 ON
Ducted Heating:
Causes & actions from Lennox
How it shows
- g51mp surelight ds1 ds2 led: DS1 SLOW FLASH, DS2 ON (ds1: flashing (slow), ds2: on)
This manual entry does not list further causes or actions.
Applicable models & manual sources
- G51MP
Primary or secondary limit switch open. Limit must close within 3 minutes or unit goes into 1−hour Watchguard.
Disclaimer: This information is for general reference. Code wording and instructions vary by model. Always follow the service manual for your exact unit.
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Continue in ACLogics with guided diagnosis for your equipment and symptoms.
