Installer system test
To perform a System Test:
1 Press and hold CENTER and
approximately 3 seconds to enter advanced
to go to TEST. Press Select to enter
to change between Heat, Cool, Fan, Em
Heat, or Ver (thermostat version information).
to turn stages on one at a time, and
to turn them off.
5 Use the Home button to exit the System Test.
Shaded areas below apply only to TH6320U/TH6220U or as otherwise noted.
Heat Stage 1 on
Heat Stage 2 also on
Heat Stage 3 also on
Cool Stage 1 on
Cool Stage 2 also on
Em Heat on