To Next PageTo Next PageWhy Lennox ComfortSense L5732U display does not come on?
If your Lennox Thermostat display doesn't come on, it could be due to a lack of power. Check that there is 24V between the R and C terminals, and also ensure that the batteries are properly installed.
Why is the key to the right of the screen key blank on Lennox ComfortSense L5732U Thermostat?
The MORE key will remain blank unless the Furnace Filter Change Reminder feature has been activated. See User Set?Up Number 0500.
What does red LED light mean on Lennox ComfortSense L5732U?
A system monitor is connected to the thermostat's L terminal. Refer to the 'Heating or Cooling System Does Not Turn On' sections for troubleshooting suggestions.
Why Lennox ComfortSense L5732U Thermostat fan does not turn on in heat mode?
Verify Installer Set?Up 0180: Fan Control in Heating*. Ensure the Electric Heat option is selected.
Why are Lennox ComfortSense L5732U Thermostat heating and cooling systems running simultaneously?
Verify Installer Set?Up Number 170: Heating and/or Cooling Type*. Ensure it accurately reflects your installed system. Also, check that bare wire portions aren't touching each other.
What to do if Lennox ComfortSense L5732U heating system does not turn off?
Check Installer Set?Up Number 170: Heating and/or Cooling Type*. Make sure the setting matches the installed heating and/or cooling system.
Why is my Lennox Thermostat heating in Cool mode?
Check Installer Set?Up Number 170: Heating and/or Cooling Type*. Make sure the setting matches the installed heating and/or cooling system.
Why temperature settings do not change on Lennox ComfortSense L5732U?
Make sure your temperature settings are within these ranges: * Heating: 40°F to 90°F (4.5°C to 32°C). * Cooling: 50°F to 99°F (10°C to 37°C).
Why Lennox ComfortSense L5732U heating or cooling does not come on?
If the heating or cooling system doesn't come on with your Lennox Thermostat, it could be due to a few reasons. The thermostat minimum-off time might be activated; wait up to 5 minutes for the system to respond. Also, ensure the system selection is set to heat or cool, and check installer setup number 0170 to make sure the proper system type is selected.
What to do if Lennox Thermostat heating system does not turn on?
If your Lennox thermostat's heating system isn't turning on, try these steps: * Ensure the SYSTEM key is set to heat. * Verify the heat temperature setting is above the room temperature and "Heat On" is displayed. * Check the circuit breaker and the power switch for the heating/cooling system. * Confirm the furnace door is securely closed. Allow five minutes for the heating system to respond. If the issue persists, consider contacting a qualified service technician.
General| Model Number | L5732U |
|---|---|
| Category | Thermostat |
| Display Type | Touchscreen |
| Wi-Fi Connectivity | Yes |
| Programmable | Yes |
| Indoor Temperature Range | 40°F to 99°F |
| Humidity Control | Yes |
| Remote Sensor Capability | Yes |
| Type | Smart |
| Compatibility | Compatible with most HVAC systems |
| Power Source | Battery |
| Stages | 2 Heat / 2 Cool |
