Bard HVAC 8402-094BX Limit Switch

The Bard HVAC 8402-094BX Limit Switch is a critical OEM replacement part designed for high-limit thermal protection in Bard heating systems and wall-mount heater packages. Rated at a 210°F trip point, this automatic reset limit switch (CO) monitors the temperature of the air passing over the heat exchanger. It functions as a primary safety device, opening the electrical circuit to shut down the heating element if temperatures exceed the safe operating threshold, effectively preventing equipment damage and hazardous conditions.

As a direct successor, the 8402-094BX serves as the factory-authorized replacement for Bard S8402-094. This 210 degree auto limit is engineered for precision and reliability in demanding commercial and industrial HVAC applications. The Bard 8402-094BX features a compact, durable housing for seamless integration into existing Bard HVAC units and furnace assemblies, ensuring the system maintains OEM-compliant safety standards during high-static or low-airflow events.

• Precise Thermal Protection: Factory-calibrated for a 210°F cutoff to prevent heat exchanger stress and overheating.
• Direct OEM Fit: Ensures 1:1 compatibility with Bard systems, replacing the obsolete S8402-094 without modification.
• Automatic Reset: Simplifies troubleshooting by allowing the system to restore furnace operation once temperatures return to a safe range.
• Versatile Application: Suitable for use across Bard’s lineup of wall-mount heaters, gas furnaces, and electric heat packages.

Is the 8402-094BX compatible with older systems using the S8402-094?
Yes, the 8402-094BX is the manufacturer-specified direct replacement for the S8402-094. It meets all original technical specifications for fit and performance.

What causes this limit switch to trip frequently?
Repeated tripping is usually an indicator of restricted airflow, often caused by a dirty filter, blocked return, or a failing blower motor rather than a faulty limit control.

Can I use a higher temperature limit switch if this one keeps tripping?
No. You must always use the Bard HVAC OEM part with the correct temperature rating (210°F) to maintain the safety certification and integrity of the equipment.

California Proposition 65 Warning: This product may contain chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.

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.