To Next PageTo Next PageWhy is my Honeywell 1-Heat/1-Cool - TH5110D1022 Large R display blank?
If your Honeywell Thermostat display is blank, there might be a few reasons. First, check the circuit breaker to ensure it hasn't tripped. Also, verify that the power switch for your heating or cooling system is turned on. Make sure the furnace door is securely closed. If your thermostat uses batteries, ensure that fresh AAA alkaline batteries are correctly installed.
What to do if my Honeywell 1-Heat/1-Cool - TH5110D1022 Large R Thermostat heating system does not turn on?
If your heating system isn't turning on, first, make sure the system is set to Heat by pressing the System button. Check that the heat temperature setting is higher than the room temperature and that “Heat On” is steadily displayed. Also, check the circuit breaker and the power switch for the heating/cooling system. Ensure the furnace door is closed securely. Wait five minutes to see if the heating system responds.
What to do if my Honeywell 1-Heat/1-Cool - TH5110D1022 Large R cooling system does not turn on?
If the cooling system isn't activating, set the system to Cool using the System button. Verify that the cool temperature setting is below the room temperature and that “Cool On” is steadily displayed. Check the circuit breaker and the power switch for the heating/cooling system. Ensure the furnace door is securely closed. Allow five minutes for the cooling system to respond.
Why is “Heat On” flashing on my Honeywell 1-Heat/1-Cool - TH5110D1022 Large R Thermostat display?
If “Heat On” is flashing on your Honeywell Thermostat display (for heat pump systems only), the compressor minimum-off timer is active. Please wait up to five minutes for the heating system to turn on.
Why is “Cool On” flashing on my Honeywell Thermostat display?
If “Cool On” is flashing on the display, the compressor minimum-off timer is active. Allow up to five minutes for the cooling system to activate.
Why “Heat On” is not showing on my Honeywell 1-Heat/1-Cool - TH5110D1022 Large R?
If “Heat On” isn't showing on your Honeywell Thermostat, set the System setting to Heat and ensure the temperature setting is above the current room temperature.
Why “Cool On” is not showing on my Honeywell Thermostat?
If “Cool On” isn't displayed on your Honeywell Thermostat, make sure the System setting is set to Cool and the temperature setting is below the room temperature.
General| Brand | Honeywell |
|---|---|
| Model | 1-Heat/1-Cool - TH5110D1022 Large R |
| Category | Thermostat |
| Language | English |
Identifies physical parts and buttons of the thermostat for user interaction.
Explains the meaning of icons and text displayed on the thermostat screen.
Instructions for selecting heating, cooling, auto, or off modes on the thermostat.
Guide to choosing between automatic and continuous fan operation modes.
Steps to adjust the desired heating or cooling temperature setpoints.
Step-by-step instructions for safely replacing the thermostat's batteries.
How to set the thermostat system to utilize the Auto Changeover mode.
Steps for setting distinct heat and cool temperatures when in Auto mode.
Solutions for blank displays or when heating/cooling systems fail to respond correctly.
Interpreting "Heat On" or "Cool On" indicators and troubleshooting related system behavior.
