Thermostats

1-Week Programmable Thermostat (RTH221B1039)

Features
FEATURES
A 1-Week Programmable Thermostat designed for low volt heating/cooling systems with simple programming and features that make it easy to use.
Setup
SETUP
Verify compatibility with your home heating and cooling system, remove your existing thermostat and follow step-by-step instructions for installation.
Easy to use thermostat for low volt heating/cooling systems

Our 1-Week Programmable Thermostat is easy to use and compatible with low volt heating/cooling system, including millivolt and single-stage heat pumps without auxiliary heat. It features simple programming. Just program the entire week. If necessary, you can also program up to four periods per day like sleep, wake, leave and return.

  • Simple programming (one program for entire week, plus four periods per day)
  • Easy to use
  • Precise temperature control
  • Sleek one-piece design
  • One-year warranty
  • DIY installation
Specs
  • Model number: RTH221B1039
  • Dimensions: 3-3/8 in. wide x 4-3/4 in. high x 1-1/8 in. deep

Compatible with systems

  • This thermostat is compatible with low volt heating/cooling systems, including millivolt and single-stage heat pumps without auxiliary heat.
  • It is not compatible with heat pump systems with backup heat or electric baseboard heat (120/240V).


Follow the quick installation guide that comes with the 1-Week Programmable Thermostat RTH221B1039. If you misplaced this guide, you can find it in the resources section below. Installation is fast and easy. Remove your old thermostat, but be sure to label the wires. Install and wire your new thermostat. Set your new thermostat to match your heating/cooling system.

RESOURCES

Download PDF
1-Week Programmable Thermostat Operating Manual
Model: RTH2300,RTH221
English,Spanish
Download PDF
1-Week Programmable Thermostat Installation Manual
Model: RTH111,RTH221
English,French,Spanish
Download PDF
1-Week Programmable Thermostat Owner's Manual
Model: RTH221
English,French,Spanish
Download PDF
1-Week Programmable Thermostat Installation Manual
Model: RTH2300,RTH221
English,Spanish
Download PDF
1-Week Programmable Thermostat Installation Manual
Model: RTH2300,RTH221
English,Spanish