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REPLACED BY P374-1700 Features: - Large, easy to read display. - Auto Changeover, 1-Stage Cool, 2-Stage Heat for use with gas/electrics, heat pumps, electric & hydronic heat. - Dual-Setpoint with adjustable deadband, setpoint adjustment range from 35° to 99° F. - Switchable to Fahrenheit or Celsius. - Single Day Programmable with 4 time periods. - Extremely easy to program, instructions inside door. - Thermostat Locking - Set points can be adjusted only by authorized individuals when thermostat is locked. - Thermoglow Continuously Lit Electro-luminous Display (backlight can be switched to not run continuously). - Display shows both heating and cooling setpoints and room temperature simultaneously. - Maintains temperature to within 1° of setpoint. - Adjustable deadband - can be adjusted 1 to 6 degrees. - Temperature sensor calibration. - All programming and setpoints stored in non-volatile memory, and are never lost in power failure. - Red/Green LED shows whether thermostat is calling for Heating or Cooling. - 5 minute compressor time guard and adjustable cycle limit, both overrideable for servicing equipment. Approximate dimansions - 4 3/4" W X 4 1/2" H