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Loading...What to do if my Honeywell T3 heating system does not respond to temperature adjustments?
If your heating system isn't responding to temperature adjustments, ensure the set temperature is higher than the current room temperature. Also, verify that the heating system is powered on. If you have the T3R model, check that the Receiver Box is powered and that the Thermostat has a wireless signal.
Why is the screen blank on my Honeywell T3?
If the screen on your Honeywell Thermostat is blank, replace the batteries if you have a T3 or T3R model. If you have a T3M model, check that the OpenTherm boiler has power, or contact your installer.
What does it mean when my Honeywell T3 is flashing + and the Receiver Box LED is flashing RED?
If your Thermostat is flashing + and the Receiver Box LED is flashing RED, it indicates a lost wireless signal. Try moving the Thermostat to a different location to restore communication.
General| Display | LCD |
|---|---|
| Wi-Fi Connectivity | No |
| Touchscreen | No |
| Energy Star Certified | No |
| Programming | 7-day, 5-2 day |
| Power Source | Battery or hardwired |
| Control Mode | Manual and Programmable |
| Compatibility | Conventional and Heat Pump systems |
| Display Type | Digital |
Explains the thermostat's display and physical controls for user interaction.
Details the meaning of various icons displayed on the thermostat screen.
Outlines the default heating schedule and how to adjust it.
Step-by-step guide to modifying time periods and temperatures in the heating schedule.
Explains thermostat operation following the programmed schedule with AUTO icon.
Describes thermostat operation in manual mode, maintaining a constant set temperature.
