Bard 8402-165BX Limit Switch
The Bard 8402-165BX Limit Switch is a critical high-temperature safety component engineered for Bard wall-mount HVAC units and furnaces. This L250-3F Auto Limit Switch is designed to monitor internal plenum temperatures, automatically opening the electrical circuit to shut down heating elements or burners if temperatures exceed the 250°F threshold. Its primary function is to prevent heat exchanger damage and ensure safe system operation during restricted airflow conditions.
As a veteran-grade HVAC replacement part, the 8402-165BX features a 3-inch insertion depth and a fixed-temperature, snap-action bimetal disc for precise thermal response. This Bard 8402-165BX OEM limit serves as a direct replacement for various Bard HVAC safety switches, maintaining the integrity of the original equipment manufacturer (OEM) safety string. For technicians, this means a drop-in fit with standard terminal connections, reducing diagnostic time and ensuring the furnace high limit control resets automatically once temperatures return to a safe operational range of 220°F (30°F differential).
Key Benefits- OEM Precision: Guaranteed compatibility with Bard wall-mount units to maintain original safety certifications and airflow logic.
- Automatic Reset: The L250-3F logic eliminates the need for manual resets, restoring system functionality automatically after cooling.
- Snap-Action Bimetal Disc: Provides a rapid, reliable break in the circuit to stop overheating before component fatigue occurs.
- Durable Construction: Built to withstand the high-cycle demands of commercial and industrial HVAC environments.
What causes this limit switch to trip frequently?
Frequent tripping is almost always an airflow issue. Check for a dirty air filter, blocked return grilles, or a failing blower motor that isn't pulling enough CFM across the heat exchanger.
Can I bypass the 8402-165BX to keep the heat running?
No. As a technician, you know the limit switch is a safety device. Bypassing it can lead to heat exchanger cracks, fire hazards, or severe equipment damage.
How do I test if the L250-3F is faulty or just open?
Use a multimeter to check for continuity across the terminals. If the switch is cool and shows an open circuit (OL), the internal bimetal disc is stuck or damaged and requires replacement.
This item is not eligible for free shipping.
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.
Bard 8402-165BX Limit Switch
The Bard 8402-165BX Limit Switch is a critical high-temperature safety component engineered for Bard wall-mount HVAC units and furnaces. This L250-3F Auto Limit Switch is designed to monitor internal plenum temperatures, automatically opening the electrical circuit to shut down heating elements or burners if temperatures exceed the 250°F threshold. Its primary function is to prevent heat exchanger damage and ensure safe system operation during restricted airflow conditions.
As a veteran-grade HVAC replacement part, the 8402-165BX features a 3-inch insertion depth and a fixed-temperature, snap-action bimetal disc for precise thermal response. This Bard 8402-165BX OEM limit serves as a direct replacement for various Bard HVAC safety switches, maintaining the integrity of the original equipment manufacturer (OEM) safety string. For technicians, this means a drop-in fit with standard terminal connections, reducing diagnostic time and ensuring the furnace high limit control resets automatically once temperatures return to a safe operational range of 220°F (30°F differential).
Key Benefits- OEM Precision: Guaranteed compatibility with Bard wall-mount units to maintain original safety certifications and airflow logic.
- Automatic Reset: The L250-3F logic eliminates the need for manual resets, restoring system functionality automatically after cooling.
- Snap-Action Bimetal Disc: Provides a rapid, reliable break in the circuit to stop overheating before component fatigue occurs.
- Durable Construction: Built to withstand the high-cycle demands of commercial and industrial HVAC environments.
What causes this limit switch to trip frequently?
Frequent tripping is almost always an airflow issue. Check for a dirty air filter, blocked return grilles, or a failing blower motor that isn't pulling enough CFM across the heat exchanger.
Can I bypass the 8402-165BX to keep the heat running?
No. As a technician, you know the limit switch is a safety device. Bypassing it can lead to heat exchanger cracks, fire hazards, or severe equipment damage.
How do I test if the L250-3F is faulty or just open?
Use a multimeter to check for continuity across the terminals. If the switch is cool and shows an open circuit (OL), the internal bimetal disc is stuck or damaged and requires replacement.
This item is not eligible for free shipping.
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.
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Product Information
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Description
The Bard 8402-165BX Limit Switch is a critical high-temperature safety component engineered for Bard wall-mount HVAC units and furnaces. This L250-3F Auto Limit Switch is designed to monitor internal plenum temperatures, automatically opening the electrical circuit to shut down heating elements or burners if temperatures exceed the 250°F threshold. Its primary function is to prevent heat exchanger damage and ensure safe system operation during restricted airflow conditions.
As a veteran-grade HVAC replacement part, the 8402-165BX features a 3-inch insertion depth and a fixed-temperature, snap-action bimetal disc for precise thermal response. This Bard 8402-165BX OEM limit serves as a direct replacement for various Bard HVAC safety switches, maintaining the integrity of the original equipment manufacturer (OEM) safety string. For technicians, this means a drop-in fit with standard terminal connections, reducing diagnostic time and ensuring the furnace high limit control resets automatically once temperatures return to a safe operational range of 220°F (30°F differential).
Key Benefits- OEM Precision: Guaranteed compatibility with Bard wall-mount units to maintain original safety certifications and airflow logic.
- Automatic Reset: The L250-3F logic eliminates the need for manual resets, restoring system functionality automatically after cooling.
- Snap-Action Bimetal Disc: Provides a rapid, reliable break in the circuit to stop overheating before component fatigue occurs.
- Durable Construction: Built to withstand the high-cycle demands of commercial and industrial HVAC environments.
What causes this limit switch to trip frequently?
Frequent tripping is almost always an airflow issue. Check for a dirty air filter, blocked return grilles, or a failing blower motor that isn't pulling enough CFM across the heat exchanger.
Can I bypass the 8402-165BX to keep the heat running?
No. As a technician, you know the limit switch is a safety device. Bypassing it can lead to heat exchanger cracks, fire hazards, or severe equipment damage.
How do I test if the L250-3F is faulty or just open?
Use a multimeter to check for continuity across the terminals. If the switch is cool and shows an open circuit (OL), the internal bimetal disc is stuck or damaged and requires replacement.
This item is not eligible for free shipping.
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.
