Why is “Cool On” or “Heat On” flashing on my Honeywell Home RTH111?
If your Honeywell Home Thermostat displays a flashing “Cool On” or “Heat On,” the compressor protection feature is active. To resolve this, simply wait 5 minutes to allow the system to restart safely, which prevents damage to the compressor.
What to do if Honeywell Home RTH111 heating or cooling system does not respond?
If your Honeywell Home Thermostat-controlled heating or cooling system isn't responding, make sure you've set the system switch to Heat and that the set temperature is higher than the current room temperature. Alternatively, if you're trying to cool, ensure the system switch is set to Cool and the temperature is set lower than the current room temperature. After making these adjustments, wait 5 minutes for the system to respond.
How to fix “Heat On” is not displayed on Honeywell Home RTH111 Thermostat?
If your Honeywell Home Thermostat is not displaying “Heat On”, set the System switch to Heat, and ensure the set temperature is higher than the current room temperature.
What to do if “Cool On” is not displayed on Honeywell Home Thermostat?
To resolve the issue of “Cool On” not being displayed on your Honeywell Home Thermostat, set the System switch to Cool, and make sure the set temperature is lower than the current room temperature.
How to fix blank display on Honeywell Home Thermostat?
If the display on your Honeywell Home Thermostat is blank, ensure that fresh AAA alkaline batteries are correctly installed.
General| Power Source | Battery-powered |
|---|---|
| Stages | 1 Heat / 1 Cool |
| Color | White |
| Type | Non-programmable |
| Compatibility | Single-stage heating and cooling systems |
| Display | LCD |
| Temperature Range | 40°F to 90°F |
| Voltage | 24V |
Ensure the heating/cooling system power is switched off before starting.
Detach the old thermostat, leaving the wallplate and attached wires.
Label each wire using the provided tags for correct re-connection.
Match labeled wires to the correct terminals on the new thermostat.
Select your system type (Heat/Cool or Heat Only/Cool Only) after installation.
Control your heating or cooling system (Heat, Off, Cool).
Prevents compressor damage by delaying restarts.
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