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The PRO programmable family of thermostats offers a basic thermostat with the benefits of energy savings. the PRO features an easy-to-read display and 5-2 day programming.


  • Weekday/Weekend programming - 5-2 (Weekdays, Weekend) programming
  • Backlit digital display - both current and set temperatures are easy to read in various lighting conditions
  • Precise comfort control [±1 F (± 0.5 C)] - maintains consistent comfort to the highest level of accuracy
  • Basic operation - easy-to-use slide switches allow you to select the heat or cool mode, and operate the fan
  • the PRO 4000 has built in instructions - simple, pull out instruction manual
  • Adaptive Intelligent Recovery™ - ensures programmed temperature is reached by programmed time

Product Specifications

Heat/Cool or Heat Pump without Auxiliary Heat
Dimensions (in.)
4 11/16 in. High X 2 7/8 in. Wide X 1 1/8 in. Deep
Dimensions (mm)
120 mm high x 74 mm wide x 28 mm deep
Item Type
Electrical Ratings
20 to 30 Vac or 750 mV
50 Hz,60 Hz
1 Heat/1 Cool
Operating Humidity Range (% RH)
5 to 90% RH, non-condensing
Switch Positions (System)
Switch Positions (Fan)
Power Method
Dual Powered: Battery or Hardwire
Premier White®
5-2 Day Program
Terminal Designations
R, RC, C, W, Y, G, O, B
Display Size
1.73 sq in.
Setting Temperature Range (F)
Heat: 40 F to 90 F; Cool: 50 F to 99 F
Setting Temperature Range (C)
Heat: 4.5 C to 32 C; Cool: 10 C to 37 C
Cycles per Hour
Heating 2 - 6 CPH; Cooling 2 -6 CPH
Cool Current
0.02 A to 1.0 A running
Heat Current
0.02 A to 1.0 A running
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