Why is my system heating when it’s set to cooling?

If the heating/cooling system is providing warm air when it’s in cooling mode, complete the following steps:
1. Verify the thermostat is wired correctly.
2. Make sure the thermostat is configured correctly for the heating/cooling system type.
3. Verify the wiring is connected correctly and securely to the thermostat.
If the above information has been verified and the issue is still present, contact a HVAC professional.

What is Honeywell’s warranty on the T5 7-Day Programmable thermostat?

The warranty is one year.

What comes in the T5 7-Day Programmable Thermostat package?

T5 Thermostat, UWP mounting system and quick installation guide.

What can I clean the screen with?

To clean the screen, use household glass cleaner, but do not spray it directly on the screen. The cleaner can be put onto a soft cloth and used to wipe the screen.

What is the R-Slider Tab?

This is a built-in jumper switch in case there are two transformer systems. If there is only one R-Wire and it is connected to the R, Rc, or Rh terminal on the old thermostat, set the slider to the up position (1 wire). (Slider will automatically hide Rc position and internally jump R and Rc together.) If there is one wire connected to the R terminal and one wire connected to Rc terminal, set the Slider to the down position (2 wires).

How do I set the time on my T5 7-Day Programmable Thermostat?

  • Press the Menu button. Press the “+” button until “TIME” appears. Press SELECT.
  • You will see “12HR” appear. Here you will be able to choose 12 or 24 hour clock options. You may choose between the two options by pressing the + or – . Then Press “Select button.
  • This will then bring you to the option to edit the time. You will see the HOUR flashing in the digital clock. Press + or – to adjust the hour. Press SELECT.
  • Press + or – to adjust the minutes. Press SELECT.

How do I set the date on my T5 7-Day Programmable Thermostat?

  • Press the Menu button. Press the “+” button until “Date” appears. Press SELECT.
  • Press + button to advance to the “DATE” to be displayed on the screen. Press SELECT. You will see the Year flashing.
  • Press + or – to change the year.
  • Press SELECT to advance to change the month.
  • Press + or – to advance to the desired month.
  • Press SELECT to advance to the date.
  • Press + or – to change the date, then press SELECT to save and exit.


T5 7-Day Programmable Thermostat

Thermostat TypeProgrammable
ColorFront white, Side gray
For Use WithFloor/Wall furnace 24 V or 750 mV, Volt gas fireplace 24 V or 750 mV
IncludesThermostat, Quick installation guide, Screws, Anchors, UWP mounting system
Program Modes7-Day Programmable
Utility RewardsYes
Display TypeLCD Screen, Digital
Power SupplyBattery
Product Height3.86 in
Product Length5.36 in
Product Width1.08 in
Warranty1 Year
Control FunctionsHeating, Cooling
Alerts and RemindersFilter Change 1, Battery Replacement, Memory Error, Unknown Time, Internal Sensor Failure


Quick Install Guide: T5 Smart Thermostat RCHT8610WF

Quick Installation Guide [pdf]: RTH7500 Series Programmable Thermostat

Quick Installation Guide [pdf]:RTH7400 / RTH7500 Series Programmable Thermostat

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