Bard HVAC 8403-090 Thermostat

The Bard 8403-090 is a heavy-duty, 24V programmable thermostat engineered specifically for multi-stage HVAC systems. As a 3HT/2CL T6 Pro model, it provides precise control for up to three stages of heating and two stages of cooling, making it essential for complex wall-mount heat pump and air conditioner setups. This unit serves as the direct replacement for 8403-058 and 8403-059, ensuring a seamless retrofit without the need for extensive wiring modifications. It features an intuitive 7-day, 5-1-1, or 5-2 day programming schedule to maximize energy efficiency and equipment lifespan. For technicians, the dual fuel compatibility and simple terminal block layout streamline the installation process. Its high-contrast display and backlighting allow for clear visibility in mechanical rooms or tight service areas. By utilizing the Honeywell T6 platform architecture, this Bard-labeled control offers the reliability required for critical commercial HVAC applications.

• Universal Compatibility: Operates 3H/2C heat pump systems or 2H/2C conventional systems with ease.
• Direct Retrofit: Engineered specifically to replace legacy Bard 8403-058 and 8403-059 thermostats.
• Advanced Programming: Supports flexible scheduling to reduce operational costs and equipment wear.
• Rugged Reliability: Built on the proven Honeywell T6 chassis for long-term performance in demanding environments.
• Intuitive Interface: Large backlit screen provides immediate feedback on system status and setpoints.

Common Questions

Is the 8403-090 compatible with older Bard wall-mount units?
Yes, this Bard thermostat replacement is designed to work with most Bard heat pumps and air conditioners requiring 24V control, specifically replacing the 8403-058 and 8403-059 models.

Does this thermostat support dual fuel or heat pump applications?
The Bard 8403-090 supports up to 3 stages of heat and 2 stages of cool, making it ideal for heat pump configurations with auxiliary or emergency heat strips.

Can I use a common wire with this thermostat?
Yes, a 24V common wire (C-wire) is required for constant power, ensuring the programming and display remain active without relying solely on batteries.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.