Honeywell Home CT87K1004 The Round Heat Only Manual Thermostat,Large,White,Large Free delivery on eligible orders of £20 or more. Check your wiring. Open Hours: The best smart thermostat can make a big difference to your home, giving you more control, allowing you to automate heating and cooling, and saving money in the long-run. If you have a heat pump, you will not use a wire in the W terminal. Saturday and Sunday: 9am - 5pm CDT, Online Order Support and Customer Service It will show as a valid Temp sensor though. Monday through Friday:9am to 8pm CDT Sundial RF2 Pack 4 (Y9120W1000) contains: … Uses geofencing technology to keep track of your smart phone’s location;Auto changeover: The Lyric T5 smart thermostat can be set to determine if the home’s system should be in heating or cooling mode to provide maximum … Not cool Honeywell. A power loss in either system could cause Honeywell thermostat not cooling down the house. We have a great range of wireless thermostats available that make it easier to control your heating remotely. (W controls your first stage of heating for Gas/Oil/Electric systems. Saturday and Sunday: 9am - 5pm CDT, Total Connect Comfort Thermostats But main feature is that it allows differential temperature of upto 0-6 degree F. Also if the thermostat is designed for two or more stage heating/cooling the it allows differential temperature changes for second stage as well. Copyright © 2020 Resideo Technologies, Inc. Honeywell Home is a trademark of Honeywell International Inc. used under license to Resideo Technologies, Inc. Check that the heat works. O/B and Y control your first stage heating for heat pump systems. Design. Everything has worked fine up until a couple of days ago. Honeywell, Inc. T8034C1481 Heating and Cooling Thermostat, Premier White, Horizontal: Thermostat Controllers: Industrial & Scientific 9am to 6pm CDT With these months comes the sweltering heat that will keep you tucked away in the cool comfort of the great indoors. 2 stage thermostats offer more features which allows them to cater to both cooling and heating. If this is a new installation, or if this is the first time you've set your thermostat to cooling since it was installed: i have forced air AC , and a Steam heat with radiators. Verify that the wiring was matched correctly from the old thermostat to the new thermostat. But if your thermostat is not holding temperature then your home will feel cooler than it should. More control of your home comfort. For Rheem or Ruud brand heat pumps, the O/B must energize on heating (B on Heat). There are a few reasons a thermostat may not be maintaining its heat … Shop Honeywell T812C1000 Heating and Cooling Thermostat. Single-stage Programmable Thermostat Support, Pro 2000 Horizontal Programmable Thermostat Support, This programmable thermostat also automatically determines whether or not your home needs heating or cooling based on the surrounding temperatures. FREE Shipping by Amazon. Monday through Friday: I can get power to the new thermostat and get the fan running. Call any of the product support numbers above and select the 'Contractor' option. If you have a wire in the R terminal and a wire in the Rc terminal, the jumper selector switch must be in the "2 Wire" position. Connected Smart Home Products Backup heat sources must be connected to the W2, Aux, or E terminal for proper functionality.). All day (24 hours), Monday through Sunday, Professional Contractor Support