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6. Error mode – if the thermostat is unable to control your system due to an unexpected
problem,thethermostatwillenterErrorMode.Inthiscondition,thethermostatashes“E1”,
“E2”, or “E3” on the LCD display, and shuts off your system.
7. Auto cut off – automatically turns the system off if the temperature rises above 95o F (35o
C) or drops below 40o F (4o C).
(If your HVAC system has malfunctioned, the system will no longer respond to thermostat
controls and the Auto cut off will have no effect.)
8. Your CTC thermostat also has "Freeze Protection". When the temperature drops to below
40o F, the thermostat will automatically turn on the heat to maintain 40o F.
Icons and Features (cont.)