Introduction
This operating manual provides essential information for the Honeywell TH4000 Series Programmable Thermostat. Designed for reliable and user-friendly climate control, this thermostat offers features such as programmable weekday/weekend schedules, one-touch temperature control overrides, and energy-saving settings to maximize cost savings. The clear, backlit display shows both room temperature and the set temperature, ensuring ease of use.
This manual covers models TH4110D (for 1 Heat/1 Cool systems) and TH4210D (for 2 Heat/1 Cool heat pump systems). Please read and save these instructions for future reference.
Key Features
- Separately programmable weekday/weekend schedules.
- One-touch temperature control overrides program schedule at any time.
- Energy-saving settings for maximum cost savings.
- Large, clear, backlit display that is easy to read.
- Displays both room temperature and temperature setting.
- Built-in compressor protection to prevent damage.
Getting Started
Your new thermostat is pre-programmed and ready for use. To ensure proper operation, follow these initial setup steps:
- Set the current time and day.
- Select the system setting (Cool, Off, Heat, or Em Heat).
- Select the fan setting (Auto or On).
- Program your desired schedules for optimal energy savings.
Refer to the relevant sections within this manual for detailed instructions on each step.
Important Safety Information
CAUTION: EQUIPMENT DAMAGE HAZARD. To prevent possible compressor damage, do not operate the cooling system when the outdoor temperature is below 10°C (50°F).
