Lennox Ellite Series - User Manual

Questions and Answers

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Jose IrwinAug 18, 2025
What to do if Lennox Ellite heating system does not turn on?
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  Amber HayesAug 19, 2025
  To troubleshoot a Lennox Thermostat when the heating system doesn't turn on, first set the system to heat using the SYSTEM key. Ensure the heat temperature is set above the current room temperature and that "Heat On" is displayed on the screen. Check the circuit breaker, the power switch for the heating/cooling system, and ensure the furnace door is securely closed. Allow five minutes for the system to respond. If the issue persists, it is recommended to contact a qualified service technician.
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davidwatersAug 21, 2025
What to do if Lennox Thermostat cooling system does not turn on?
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  Amber LamAug 21, 2025
  To troubleshoot why the Lennox Thermostat cooling system doesn't turn on, start by setting the system to Cool using the SYSTEM key. Make sure the cool temperature setting is below the room temperature and that "Cool On" is displayed on the screen. Check the circuit breaker, the power switch for the heating/cooling system, and ensure the furnace door is closed securely. Wait five minutes for the cooling system to respond. If the problem remains, contact a qualified service technician.
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Earl ForbesAug 23, 2025
Why does my Lennox Ellite say "Wait"?
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  ahuffAug 23, 2025
  If the Lennox Thermostat displays "Wait" on the screen, it means the compressor minimum-off timer is active. Please wait up to five minutes for the compressor to turn on.
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Elizabeth SchultzAug 26, 2025
How to fix Lennox Ellite when "Heat On" is not displayed?
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  morriscalebAug 26, 2025
  If "Heat On" is not displayed on your Lennox Thermostat, set the System setting to Heat and make sure the temperature setting is higher than the room temperature. If "Heat On" appears but the heating system still doesn't activate, refer to the suggestions for 'Heating system does not turn on'.
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adam64Aug 28, 2025
How to fix Lennox Ellite Thermostat when "Cool On" is not displayed?
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  Jose RussellAug 28, 2025
  If "Cool On" is not displayed on the Lennox Thermostat screen, set the System to Cool and ensure the temperature is set below the room temperature. If "Cool On" appears but the cooling system doesn't turn on, see the troubleshooting steps for 'Cooling system does not turn on'.
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Jonathon CarneyAug 30, 2025
What to do if Lennox Thermostat heating system does not turn off?
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  James Riley MDAug 30, 2025
  To address the Lennox Thermostat's heating system not turning off when set below room temperature (and "Heat On" is not displayed), verify that the setting in Installer Set?Up Number 170: Heating and/or Cooling Type* matches the installed heating and/or cooling system.
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nataliehobbsSep 1, 2025
Why can't I set my Lennox Thermostat to Cool?
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  Joshua BergerSep 1, 2025
  If you cannot set the System setting to Cool on your Lennox Thermostat, check Installer Set?Up Number 170: Heating and/or Cooling Type*. Ensure the setting matches your installed heating and/or cooling system.
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joshua14Sep 3, 2025
How to fix a blank display on Lennox Ellite?
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  Paula WellsSep 4, 2025
  To troubleshoot a blank display on your Lennox Thermostat, check that fresh AAA alkaline batteries are installed correctly, as marked on the thermostat.
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Tonya LawsonSep 6, 2025
Why are my Lennox Thermostat heating and cooling systems running at the same time?
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  Hannah PerezSep 6, 2025
  To resolve the issue of both heating and cooling systems operating simultaneously on your Lennox Thermostat, verify that the setting in Installer Set?Up Number 170: Heating and/or Cooling Type* matches the installed system. Also, check that no bare wires are touching each other.
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Jessica MillerSep 8, 2025
Why is my Lennox Ellite heating in Cool mode?
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  collinsjefferySep 8, 2025
  To resolve a Lennox Thermostat running heat in Cool mode, verify that the setting in Installer Set?Up Number 170: Heating and/or Cooling Type* matches the installed heating and/or cooling system.