What It Means
- LF24, TUA*S(N,L)(A,S)F: Normal Operation - No call for heat
- G24M: Normal Operation and No Call For Heat
Lennox Ducted Heating
Lennox Ducted Heating Error Code Slow Flash
Ducted Heating
Slow Flash 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
Normal Operation - No call for heat
Models: LF24, TUA*S(N,L)(A,S)F
Unit heater (indoor)
How it shows
- integrated control single led: Slow Flash
Normal Operation - No call for heat (When thermostat is placed in continuous fan mode LED will slowly flash)
Applicable models & manual sources
- LF24
Normal Operation − No call for heat
- TUA*S(N,L)(A,S)F
Normal Operation - No call for heat
Normal Operation and No Call For Heat
Models: G24M
How it shows
- a3 diagnostic led: Slow Flash
This manual entry does not list further causes or actions.
Applicable models & manual sources
- G24M
Normal Operation and No Call For Heat
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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