Bard 8402-116 Limit Switch
The Bard 8402-116 Limit Switch is a critical safety component designed for high-temperature protection in Bard wall-mount heat pumps and air conditioning units. Engineered with a fixed temperature setting of L300-30, this high-limit control opens the electrical circuit when the internal plenum temperature reaches 300 degrees Fahrenheit and automatically resets when it cools by 30 degrees. This normally closed (NC) disc-style switch prevents heat exchanger damage and ensures safe operation during airflow restrictions or blower failure. Featuring a flush mount flange and standard 1/4-inch quick-connect terminals, the 8402-116 provides a direct OEM replacement for a seamless fit in the heater control string. HVAC technicians rely on this snap-action thermostat for its precise thermal response and long-term reliability in demanding commercial and educational HVAC applications. Proper installation of this 300F limit control is essential for maintaining equipment safety standards and preventing hazardous overheating conditions.
- Precise Thermal Protection: Fixed L300-30 calibration ensures accurate high-limit cutout at 300°F.
- OEM Compatibility: Designed specifically for Bard HVAC systems, ensuring proper fit and electrical integration.
- Automatic Reset: Resets the circuit once temperatures drop below the 30-degree differential, reducing unnecessary downtime.
- Durable Construction: Built to withstand the high-cycle demands of commercial climate control units.
Common HVAC Questions
What causes a Bard high limit switch to trip?
A tripped L300-30 switch typically indicates restricted airflow caused by dirty filters, a failing blower motor, or obstructed return air ducts.
How do I test the Bard 8402-116 for continuity?
With power disconnected and the switch at room temperature, use a multimeter to check for continuity across the terminals; the switch should be closed (zero resistance).
Can I bypass this limit switch for testing?
Bypassing a safety limit is not recommended for operation. If the switch opens, the underlying airflow or combustion issue must be diagnosed to prevent equipment failure.
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 8402-116 Limit Switch
The Bard 8402-116 Limit Switch is a critical safety component designed for high-temperature protection in Bard wall-mount heat pumps and air conditioning units. Engineered with a fixed temperature setting of L300-30, this high-limit control opens the electrical circuit when the internal plenum temperature reaches 300 degrees Fahrenheit and automatically resets when it cools by 30 degrees. This normally closed (NC) disc-style switch prevents heat exchanger damage and ensures safe operation during airflow restrictions or blower failure. Featuring a flush mount flange and standard 1/4-inch quick-connect terminals, the 8402-116 provides a direct OEM replacement for a seamless fit in the heater control string. HVAC technicians rely on this snap-action thermostat for its precise thermal response and long-term reliability in demanding commercial and educational HVAC applications. Proper installation of this 300F limit control is essential for maintaining equipment safety standards and preventing hazardous overheating conditions.
- Precise Thermal Protection: Fixed L300-30 calibration ensures accurate high-limit cutout at 300°F.
- OEM Compatibility: Designed specifically for Bard HVAC systems, ensuring proper fit and electrical integration.
- Automatic Reset: Resets the circuit once temperatures drop below the 30-degree differential, reducing unnecessary downtime.
- Durable Construction: Built to withstand the high-cycle demands of commercial climate control units.
Common HVAC Questions
What causes a Bard high limit switch to trip?
A tripped L300-30 switch typically indicates restricted airflow caused by dirty filters, a failing blower motor, or obstructed return air ducts.
How do I test the Bard 8402-116 for continuity?
With power disconnected and the switch at room temperature, use a multimeter to check for continuity across the terminals; the switch should be closed (zero resistance).
Can I bypass this limit switch for testing?
Bypassing a safety limit is not recommended for operation. If the switch opens, the underlying airflow or combustion issue must be diagnosed to prevent equipment failure.
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.
Product Information
Product Information
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Shipping & Returns
Description
The Bard 8402-116 Limit Switch is a critical safety component designed for high-temperature protection in Bard wall-mount heat pumps and air conditioning units. Engineered with a fixed temperature setting of L300-30, this high-limit control opens the electrical circuit when the internal plenum temperature reaches 300 degrees Fahrenheit and automatically resets when it cools by 30 degrees. This normally closed (NC) disc-style switch prevents heat exchanger damage and ensures safe operation during airflow restrictions or blower failure. Featuring a flush mount flange and standard 1/4-inch quick-connect terminals, the 8402-116 provides a direct OEM replacement for a seamless fit in the heater control string. HVAC technicians rely on this snap-action thermostat for its precise thermal response and long-term reliability in demanding commercial and educational HVAC applications. Proper installation of this 300F limit control is essential for maintaining equipment safety standards and preventing hazardous overheating conditions.
- Precise Thermal Protection: Fixed L300-30 calibration ensures accurate high-limit cutout at 300°F.
- OEM Compatibility: Designed specifically for Bard HVAC systems, ensuring proper fit and electrical integration.
- Automatic Reset: Resets the circuit once temperatures drop below the 30-degree differential, reducing unnecessary downtime.
- Durable Construction: Built to withstand the high-cycle demands of commercial climate control units.
Common HVAC Questions
What causes a Bard high limit switch to trip?
A tripped L300-30 switch typically indicates restricted airflow caused by dirty filters, a failing blower motor, or obstructed return air ducts.
How do I test the Bard 8402-116 for continuity?
With power disconnected and the switch at room temperature, use a multimeter to check for continuity across the terminals; the switch should be closed (zero resistance).
Can I bypass this limit switch for testing?
Bypassing a safety limit is not recommended for operation. If the switch opens, the underlying airflow or combustion issue must be diagnosed to prevent equipment failure.
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.
