System Switch (Heat/Cool) - Honeywell Thermostat PRO TH3000 Series Operating Manual

System switch
Set SYSTEM switch to control the
heating or cooling system.
The SYSTEM switch can be set to control
your heating or cooling system, depending
on the season.
• Cool: Cooling system control.
• Off: All systems are off.
• Heat: Heating system control.
• Em Heat: Emergency & Auxiliary Heat
control. Compressor is locked out.
(Select models only.)
CAUTION: EQUIPMENT DAMAGE HAZARD.
Do not operate cooling system when outdoor
temperature is below 50°F (10°C).

PRO TH3110D / TH3210D