York S1-025-46402-000 Switch
The York S1-025-46402-000 is an essential OEM L235F Manual Reset Limit Switch designed for high-limit temperature protection in York, Luxaire, and Coleman furnaces. This HVAC safety control features a fixed 235-degree Fahrenheit trip point, functioning as a "watchdog" for the heat exchanger. When internal plenum temperatures exceed safe operating parameters—often due to restricted airflow from a clogged air filter or a failing blower motor—the internal contacts snap open to break the 24V or 120V control circuit, immediately terminating the heating cycle to prevent component damage. Unlike auto-reset switches, this manual reset furnace limit requires a technician to physically depress the reset button after the unit has cooled, ensuring the underlying cause of the overheat condition is addressed. This genuine York replacement part is built for durability in residential gas furnaces and air handlers, providing reliable overheat protection and maintaining the safety integrity of the combustion chamber.
Key Benefits:- OEM Precision: Genuine S1-025-46402-000 ensures exact calibration and direct furnace part compatibility without field modifications.
- High-Temperature Security: The 235F setpoint prevents heat exchanger warping and cracked plenums by cutting power during thermal overruns.
- Manual Override: Forces diagnostic verification of the HVAC system before the burner can re-engage, increasing site safety.
- Durable Construction: Engineered to withstand the high-cycle thermal stress found in modern high-efficiency York heating systems.
Why does my blower motor keep running but the burners won't ignite?
When a manual reset limit switch trips, the control board often defaults to a safety mode that runs the blower continuously to cool the heat exchanger. If the switch has popped, it must be manually reset to allow a new ignition sequence.
Can I replace an L235F with a switch that has a different temperature rating?
No. Using a switch with a higher rating can lead to dangerous overheating, while a lower rating will cause nuisance tripping. Stick to the OEM L235F specifications for proper furnace safety limit operation.
What causes the S1-025-46402-000 to trip repeatedly?
The most common culprits are reduced airflow from dirty evaporator coils, blocked return air vents, or a capacitor-start blower motor that is failing to reach full RPM.
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.
Original: $16.61
-65%$16.61
$5.81York S1-025-46402-000 Switch
The York S1-025-46402-000 is an essential OEM L235F Manual Reset Limit Switch designed for high-limit temperature protection in York, Luxaire, and Coleman furnaces. This HVAC safety control features a fixed 235-degree Fahrenheit trip point, functioning as a "watchdog" for the heat exchanger. When internal plenum temperatures exceed safe operating parameters—often due to restricted airflow from a clogged air filter or a failing blower motor—the internal contacts snap open to break the 24V or 120V control circuit, immediately terminating the heating cycle to prevent component damage. Unlike auto-reset switches, this manual reset furnace limit requires a technician to physically depress the reset button after the unit has cooled, ensuring the underlying cause of the overheat condition is addressed. This genuine York replacement part is built for durability in residential gas furnaces and air handlers, providing reliable overheat protection and maintaining the safety integrity of the combustion chamber.
Key Benefits:- OEM Precision: Genuine S1-025-46402-000 ensures exact calibration and direct furnace part compatibility without field modifications.
- High-Temperature Security: The 235F setpoint prevents heat exchanger warping and cracked plenums by cutting power during thermal overruns.
- Manual Override: Forces diagnostic verification of the HVAC system before the burner can re-engage, increasing site safety.
- Durable Construction: Engineered to withstand the high-cycle thermal stress found in modern high-efficiency York heating systems.
Why does my blower motor keep running but the burners won't ignite?
When a manual reset limit switch trips, the control board often defaults to a safety mode that runs the blower continuously to cool the heat exchanger. If the switch has popped, it must be manually reset to allow a new ignition sequence.
Can I replace an L235F with a switch that has a different temperature rating?
No. Using a switch with a higher rating can lead to dangerous overheating, while a lower rating will cause nuisance tripping. Stick to the OEM L235F specifications for proper furnace safety limit operation.
What causes the S1-025-46402-000 to trip repeatedly?
The most common culprits are reduced airflow from dirty evaporator coils, blocked return air vents, or a capacitor-start blower motor that is failing to reach full RPM.
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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Description
The York S1-025-46402-000 is an essential OEM L235F Manual Reset Limit Switch designed for high-limit temperature protection in York, Luxaire, and Coleman furnaces. This HVAC safety control features a fixed 235-degree Fahrenheit trip point, functioning as a "watchdog" for the heat exchanger. When internal plenum temperatures exceed safe operating parameters—often due to restricted airflow from a clogged air filter or a failing blower motor—the internal contacts snap open to break the 24V or 120V control circuit, immediately terminating the heating cycle to prevent component damage. Unlike auto-reset switches, this manual reset furnace limit requires a technician to physically depress the reset button after the unit has cooled, ensuring the underlying cause of the overheat condition is addressed. This genuine York replacement part is built for durability in residential gas furnaces and air handlers, providing reliable overheat protection and maintaining the safety integrity of the combustion chamber.
Key Benefits:- OEM Precision: Genuine S1-025-46402-000 ensures exact calibration and direct furnace part compatibility without field modifications.
- High-Temperature Security: The 235F setpoint prevents heat exchanger warping and cracked plenums by cutting power during thermal overruns.
- Manual Override: Forces diagnostic verification of the HVAC system before the burner can re-engage, increasing site safety.
- Durable Construction: Engineered to withstand the high-cycle thermal stress found in modern high-efficiency York heating systems.
Why does my blower motor keep running but the burners won't ignite?
When a manual reset limit switch trips, the control board often defaults to a safety mode that runs the blower continuously to cool the heat exchanger. If the switch has popped, it must be manually reset to allow a new ignition sequence.
Can I replace an L235F with a switch that has a different temperature rating?
No. Using a switch with a higher rating can lead to dangerous overheating, while a lower rating will cause nuisance tripping. Stick to the OEM L235F specifications for proper furnace safety limit operation.
What causes the S1-025-46402-000 to trip repeatedly?
The most common culprits are reduced airflow from dirty evaporator coils, blocked return air vents, or a capacitor-start blower motor that is failing to reach full RPM.
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.
