
To modify the temperature settings on your TH5220D Non-Programmable Digital Thermostat, begin by using the up or down arrow buttons to select your preferred temperature. For heating, aim to set the temperature between 40°F and 90°F (4.5°C to 32°C). When using cooling mode, set the temperature within the range of 50°F to 99°F (10°C to 37°C). Make sure your heating and cooling settings are at least 3 degrees apart if you are using the Auto Changeover mode to allow the thermostat to switch automatically between the two modes. Always verify that your thermostat is set to the correct system mode (Heat, Cool, Auto) based on your needs. For detailed guidance and troubleshooting, please consult the Honeywell TH5220D user manual.


