RTH111 Digital Non-Programmable Thermostat

: June 7, 2024
: Honeywell

Table of Contents

How do I fix a blank display on my RTH111 thermostat?
How do I turn on/off my heating/cooling on my RTH111 thermostat?
Where do I wire my C wire on the RTH111 thermostat?
How do I access the installer setup (ISU) on the RTH111 thermostat?
Does the RTH111 thermostat work with heat pumps with auxiliary/backup
Where do I wire my C wire on the RTH111 thermostat?
Does the RTH111 thermostat work with heat pumps with auxiliary/backup
How do I access the installer setup (ISU) on the RTH111 thermostat?
How do I turn on/off my heating/cooling on my RTH111 thermostat?
How do I access the installer setup (ISU) on the RTH111 thermostat?
How do I fix a blank display on my RTH111 thermostat?
How do I fix a blank display on my RTH111 thermostat?
SPECIFICATIONS
Downloads
Read User Manual Online (PDF format)
Download This Manual (PDF format)

RTH111B1016/E1,
RTH111B1024/E1

Owner’s Manual [pdf]: RTH111 Digital Non-Programmable Thermostat

How do I fix a blank display on my RTH111 thermostat?

The RTH111 is battery powered only, there is no C wire option on the RTH111. Check and replace the batteries. If the unit does not power up, replace it.

How do I turn on/off my heating/cooling on my RTH111 thermostat?

Locate the system Slider Switch labeled Heat Off Cool. Slide the switch to the desired setting and either manually adjust the arrows to the desired set point and press hold or establish a schedule for heating and cooling.

Where do I wire my C wire on the RTH111 thermostat?

The RTH111 series does not allow for a C wire connection and the C wire should not be used. Tape the wire off with electrical tape and tuck it back in the wall.

How do I access the installer setup (ISU) on the RTH111 thermostat?

Enter System Setup:

To enter system setup, press and hold both the up and down buttons until the display changes (approximately 5 seconds).

Changing Settings:

Press the up or down button to change the setting.
Press the up and down buttons simultaneously for one second to advance to the next function.
Press the RUN button to exit and save settings. Please note ISU changes when saved are permanently held in memory and will not be forgotten. If the thermostat is reverting to default programming troubleshoot the application.

Click here to download (English/French)

Does the RTH111 thermostat work with heat pumps with auxiliary/backup

heat?

RTH111 will only work with a stand alone heat pump and will not work with heat pumps with auxiliary/backup heat.

Where do I wire my C wire on the RTH111 thermostat?

The RTH111 series does not allow for a C wire connection and the C wire should not be used. Tape the wire off with electrical tape and tuck it back in the wall.

Does the RTH111 thermostat work with heat pumps with auxiliary/backup

heat?

RTH111 will only work with a stand alone heat pump and will not work with heat pumps with auxiliary/backup heat.

How do I access the installer setup (ISU) on the RTH111 thermostat?

Enter System Setup:

To enter system setup, press and hold both the up and down buttons until the display changes (approximately 5 seconds).

Changing Settings:

Press the up or down button to change the setting.
Press the up and down buttons simultaneously for one second to advance to the next function.
Press the RUN button to exit and save settings. Please note ISU changes when saved are permanently held in memory and will not be forgotten. If the thermostat is reverting to default programming troubleshoot the application.

Click here to download (English/French)

How do I turn on/off my heating/cooling on my RTH111 thermostat?

Locate the system Slider Switch labeled Heat Off Cool. Slide the switch to the desired setting and either manually adjust the arrows to the desired set point and press hold or establish a schedule for heating and cooling.

How do I access the installer setup (ISU) on the RTH111 thermostat?

Enter System Setup:

To enter system setup, press and hold both the up and down buttons until the display changes (approximately 5 seconds).

Changing Settings:

Press the up or down button to change the setting.
Press the up and down buttons simultaneously for one second to advance to the next function.
Press the RUN button to exit and save settings. Please note ISU changes when saved are permanently held in memory and will not be forgotten. If the thermostat is reverting to default programming troubleshoot the application.

How do I fix a blank display on my RTH111 thermostat?

The RTH111 is battery powered only, there is no C wire option on the RTH111. Check and replace the batteries. If the unit does not power up, replace it.

How do I fix a blank display on my RTH111 thermostat?

The RTH111 is battery powered only, there is no C wire option on the RTH111. Check and replace the batteries. If the unit does not power up, replace it.