Description
The Bard HVAC 8402-128BX is an L220F 1-Shot Limit Switch engineered as a critical safety component for HVAC heating systems. Designed to trip at 220°F, this single-trip device provides dependable overheat protection by shutting down the system when unsafe temperatures are detected — safeguarding heat exchangers, components, and the surrounding structure from heat-related damage.
What Is a 1-Shot Limit Switch?
A 1-shot (single-trip) limit switch is a non-resettable or manual-reset safety control. Unlike automatic-reset limits, a 1-shot device requires deliberate technician intervention after it trips, ensuring that the root cause of the overheating condition is identified and corrected before the system is returned to service. This makes it an ideal choice for applications where safety and accountability are paramount.
Key Features
- OEM Bard HVAC replacement part — ensures proper fit and performance
- L220F designation indicates a 220°F trip point for precise overheat protection
- 1-shot (single-trip) operation requires manual reset, preventing automatic restart after a safety event
- Designed for use in Bard HVAC heating and packaged unit applications
- Reliable bimetal sensing element for accurate temperature response
- Durable construction built to withstand demanding HVAC operating environments
Application
The 8402-128BX limit switch is a direct OEM replacement part for compatible Bard HVAC units. It is typically installed in the heat exchanger or supply air plenum area to monitor air temperatures and protect against overheating conditions caused by restricted airflow, blower failure, or other system faults.
Why Choose Genuine Bard HVAC Parts?
Using genuine OEM replacement components like the 8402-128BX ensures compatibility, maintains equipment warranty integrity, and delivers the performance reliability that Bard HVAC systems are engineered to provide. Always verify your unit’s model and part number before ordering.
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