How do I test the heating and cooling system after installation?
Press and hold the Menu button for 5 seconds to access the Advanced Menu, then navigate to System Test and touch Select. From there, use the arrow buttons to select the type of test (heat, cool, or fan) and activate each stage. Note that compressor protection is bypassed during testing, so you should avoid cycling the compressor quickly to prevent equipment damage. (Page 17)
From the official Honeywell Lyric T6 Pro Wi-Fi Smart Thermostat manual, page 17
Have a follow-up question?
Answers from the official manual.
Common questions