Bard 8402-065 Limit Switch

The Bard 8402-065 Auto Limit Switch is a critical safety component designed for Bard wall-mount HVAC units and heater packages. This OEM limit control features a fixed L160-4.0 temperature rating, meaning it is engineered to automatically open the safety circuit if internal temperatures reach 160°F, preventing heat-related damage to the evaporator coil and heat strips. As a direct 8402-048 replacement, the 8402-065 provides a seamless technical fit for technicians servicing legacy Bard HVAC systems. Also identified by the part number 8402-065BX, this switch ensures consistent system protection by managing high-limit cutouts. When troubleshooting a furnace cycling on and off or a unit that has experienced a nuisance shutdown, verifying the continuity of the limit switch is a standard protocol. This HVAC high limit switch is built for durability in high-demand commercial and industrial wall-mount applications, maintaining the operational integrity of the primary heating circuit.

• Exact OEM Compatibility: Serves as the official 8402-048 replacement, ensuring set points and mounting brackets match factory specifications.
• Circuit Protection: The L160-4.0 limit control prevents thermal runaway by de-energizing heating elements at its calibrated 160°F threshold.
• Automatic Reset: Features an auto-reset limit switch design that restores the circuit once temperatures drop 4 degrees below the trip point.
• Universal Bard Fit: Widely used across various Bard wall-mount heater packages, simplifying inventory for service trucks.

What is the difference between 8402-065 and 8402-065BX?
Technically, there is no difference in performance or specification. The "BX" suffix simply denotes the boxed retail packaging from the manufacturer; both parts utilize the same L160-4.0 sensor.

Can this part be used if my unit originally had a 8402-048?
Yes, the 8402-065 is the direct technical successor to the 8402-048. It maintains the exact same temperature parameters and terminal configurations required for Bard HVAC equipment.

How do I know if my Bard limit switch is bad?
If the heat strips fail to engage or the blower runs continuously while the heating circuit remains open, use a multimeter to check for continuity across the terminals. An open circuit at room temperature indicates a failed switch.

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.