Honeywell T4 T4R T4M Thermostat User Manual

Honeywell Lyric T4, T4R & T4M Thermostat User Manual

Thermostat Interface

Menu

Standby mode
Away mode
Schedule Override

Changing the Batteries (T4 & T4R only)
Wireless Receiver Box (T4R only)
Troubleshooting

Your Thermostat comes with the following default schedule.
Follow the next steps to adjust the programmed schedule

If you have difficulty with your Thermostat, try these suggestions. Most problems can be corrected quickly and easily.

All models
Screen is blank	Replace the batteries (T4 & T4R only). Check the OpenTherm boiler has power (T4M only). Contact installer.
Thermostat shows	Batteries have less than 10% power and need to be replaced soon.
Thermostat is flashing +	Batteries are critically low and need to be replaced immediately - see ‘Changing the Batteries’.
Thermostat shows but the boiler does not switch on.	The boiler cycles on and off as it controls the temperature, and sometimes the icon will be displayed when the boiler has cycled off. If the boiler doesn’t switch on after a long period of time contact your installer
Heating system does not respond to temperature adjustments.	Make sure the set temperature is higher than the actual room temperature. Check the heating system is powered on. Check the Receiver Box is powered and the Thermostat has a wireless signal (T4R only).
Thermostat shows	The temperature sensor of your Thermostat is faulty, contact your installer to repair or replace the Thermostat.

Title	: Honeywell Lyric T4, T4R & T4M Thermostat User Manual
Format	: PDF
Pages	: 16 Pages
Language	: English
File Size	: 1 MB