T4 Pro Programmable Thermostat

8403-089 is the direct replacement for 8403-057, TH3110D1040

Bard HVAC 8403-089 Thermostat – T4 Pro Programmable Thermostat, Auto Changeover, 1H/1C, Non-Wi-Fi

The Bard 8403-089 Thermostat features the reliable Honeywell T4 Pro Series platform, delivering user-friendly programmable temperature control for residential and light commercial HVAC systems. Designed with contractors in mind, this non-Wi-Fi thermostat offers simple setup, intuitive operation, and smart features to enhance everyday comfort.

With auto changeover, 1 heat / 1 cool stage compatibility, and flexible programmable scheduling, the 8403-089 is ideal for single-stage heating and cooling applications. 

🔧 Key Features:

• Model: Bard 8403-089 / Honeywell T4 Pro Series

• Display: Large backlit digital screen with intuitive push-button control

• Programming: Flexible scheduling for customized comfort

• Changeover: Automatic (Auto Heat/Cool)

• Stages: 1 Heat / 1 Cool

• Temperature Control Range: 37°F to 102°F

• Dehumidification: Not supported

• Filter Change Reminder: Yes

• Wiring: No-tool terminal block for fast, simple installation

• Mounting: Standard subbase for easy replacement

📦 Specifications:

• Brand: Bard HVAC / Honeywell

• Part Number: 8403-089

• Series: T4 Pro Series

• Application: Residential & light commercial heating and cooling

• Unit of Measure: Each

Upgrade to dependable, energy-efficient control with the Bard 8403-089 T4 Pro Programmable Thermostat—ideal for homeowners and HVAC professionals seeking simple performance and trusted Honeywell quality.