What It Means
- Defrost while gas heat selected
Lennox Zone controller
Lennox Error Code 0010
Zone controller
Causes & actions from Lennox
How it shows
- harmony diagnostic led1234: 0010 (led1: off, led2: off, led3: on, led4: off)
System detected defrost signal at W1-Def terminal block while the jumper is selected for the furnace. May be caused by: • Wrong selection for indoor unit jumper. • Outdoor unit terminal block misfired. • Zone control system failure. Check unit installation instructions for correct wiring. If no signal is present at W1, then replace zone control panel.
Applicable models & manual sources
- HARMONY III
Defrost while gas heat selected
HARMONY III, X9953
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.
