Honeywell RTH111 Series Non-Programmable Thermostat

About Your New Thermostat

Your new Honeywell thermostat has been designed to give you many years of reliable service and easy-to-use, push-button climate control.

Features

• Displays ambient (measured) temperature at all times
• One-touch access to setpoint temperature
• Built-in compressor protection

Getting Started

Simply perform the three steps below and the thermostat is in operation:

1. Select system setting: Preset to Off. (To change, see page 5)
2. Select fan setting: Preset to Auto. (To change, see page 6)
3. Set the temperature using the Up ▲ or Down ▼ buttons. (To change, see pages 7)

Quick Reference to Controls

The thermostat features a display screen, system switch, fan switch, and up/down buttons.

Thermostat Controls

Display Screen: Shows current temperature, setpoint, and system status.

System Switch: Located below the display. Options are:

• Cool: Controls the cooling system.
• Off: All systems are off.
• Heat: Controls the heating system.

Fan Switch: Located below the display. Options are:

• On: The fan runs continuously.
• Auto: The fan runs only when the heating or cooling system is on.

Up/Down Buttons: Press these buttons to adjust the temperature.

Quick Reference to Display Screen

The display provides information about the thermostat's status.

Display Elements:

• Setpoint Indicator: Appears when the setpoint temperature is displayed.
• Temperature: Normally displays the ambient (measured) temperature. Pressing the Up ▲ or Down ▼ button once shows the setpoint temperature for five seconds.
• Low Battery Warning: Indicates when batteries need replacement (see page 9).
• System Status: Shows if the cooling system ("Cool on") or heating system ("Heat on") is active.
• Compressor Protection: If "Cool On" is flashing, the compressor protection feature is engaged (see page 8).

Operation: Selecting the System Setting

The SYSTEM switch controls your heating or cooling system based on the season.

System Switch Options:

• Cool: For cooling system control.
• Off: Turns all systems off.
• Heat: For heating system control.

⚠ CAUTION: EQUIPMENT DAMAGE HAZARD. To prevent possible compressor damage, do not operate the cooling system when the outdoor temperature is below 50°F (10°C).

Operation: Selecting the Fan Setting

Set the FAN switch to either "Auto" or "On".

• Auto: The fan runs only when the heating or cooling system is active. This is the most common setting.
• On: The fan runs continuously.

Operation: Adjusting the Temperature

Press the Up ▲ or Down ▼ buttons to adjust the desired temperature.

Note: Ensure the thermostat is set to the correct system (heat or cool) for your needs.

Built-in Compressor Protection

This feature helps prevent damage to your air conditioning or heat pump system's compressor. Damage can occur if the compressor restarts too soon after shutdown. This feature forces a 5-minute delay before the compressor can restart.

During the delay, the display will flash "Cool On". Once the safe wait time has passed, the message stops flashing, and the compressor turns on.

Appendices: Battery Replacement

Replace batteries when the "Lo Batt" warning appears on the screen. "Lo Batt" is displayed for 60 days before batteries are depleted.

It is recommended to replace batteries once a year, or before extended periods away (more than a month).

Thermostat settings are stored in non-volatile (permanent) memory and are preserved when batteries are removed.

Important: Set the System switch to Off before removing batteries to prevent the heating/cooling system from remaining activated.

To replace batteries:

1. Pull the thermostat from the wallplate from the bottom.
2. Turn the thermostat over and insert two fresh AAA alkaline batteries.
3. Reinstall the thermostat onto the wallplate.

Appendices: Customer Assistance

For assistance with this product, please visit http://yourhome.honeywell.com.

Alternatively, call Honeywell Customer Care toll-free at 1-800-468-1502.

To save time, please note your model number and date code before calling.

Appendices: In Case of Difficulty

Most thermostat issues can be resolved quickly. Try these suggestions:

Display is Blank

• Ensure the furnace door is closed securely.
• Verify that fresh AAA alkaline batteries are correctly installed (see page 9).

Heating or Cooling System Does Not Respond

• Set the System switch to "Heat" (see page 5) and ensure the set temperature is higher than the current indoor temperature.
• Set the System switch to "Cool" (see page 5) and ensure the set temperature is lower than the current indoor temperature.
• Wait 5 minutes for the system to respond.

Temperature Settings Do Not Change

• Ensure heating and cooling temperatures are set within acceptable ranges: Heat: 40° to 90°F (4.5° to 32°C). Cool: 50° to 99°F (10° to 37°C).

"Cool On" is Flashing

• The compressor protection feature is engaged. Wait 5 minutes for the system to restart safely (see page 8).

"Heat On" is Not Displayed

• Set the System switch to "Heat" and set the temperature level above the current room temperature (see page 5).

"Cool On" is Not Displayed

• Set the System switch to "Cool" and set the temperature level below the current room temperature (see page 5).

1-Year Limited Warranty

Honeywell warrants this product, excluding the battery, to be free from defects in workmanship and materials for one year from the date of purchase. If the product is defective, Honeywell will repair or replace it at its option.

To obtain warranty service:

• Return the product with proof of purchase to the place of purchase, or
• Call Honeywell Customer Care at 1-800-468-1502. They will advise if the product should be returned to Honeywell Return Goods, Dock 4 MN10-3860, 1885 Douglas Dr. N., Golden Valley, MN 55422, or if a replacement can be sent.

This warranty does not cover removal or reinstallation costs. It is void if the defect was caused by consumer damage.

Honeywell's sole responsibility is repair or replacement. Honeywell is not liable for any incidental or consequential damages.

This warranty is the only express warranty provided. Implied warranties are limited to one year.

Some states may not allow limitations on implied warranties or incidental/consequential damages.

For warranty questions, write to Honeywell Customer Relations, 1985 Douglas Dr, Golden Valley, MN 55422 or call 1-800-468-1502. In Canada, contact Retail Products ON15-02H, Honeywell Limited/Honeywell Limitée, 35 Dynamic Drive, Toronto, Ontario M1V4Z9.