Laars Heating Systems 2400-550 Limit Switch
The Laars Heating Systems 2400-550 is a critical OEM boiler part engineered for high-limit temperature protection in residential and light commercial hydronic systems. This 200-230F AUTO Limit Switch functions as a fail-safe high-limit control, designed to interrupt the burner circuit if heat exchanger temperatures exceed safe operational parameters. Specifically calibrated for the Laars Endurance EBP, EDN, and EDP series (sizes 110-175), this exhaust limit switch or safety limit endurance control ensures the system remains within its thermal structural limits, preventing heat exchanger damage and hazardous overheating conditions.
For technicians servicing Laars heating systems, this bimetal disc limit switch features an automatic reset mechanism, allowing the system to resume operation once temperatures have dropped below the differential threshold. With a 3/4-inch diameter footprint and a robust 230°F trip point, the 2400-550 is a direct replacement furnace limit switch that maintains the integrity of the safety string. Utilizing genuine Laars boiler parts like this high limit safety control ensures precise compatibility and long-term reliability in demanding HVACR applications.
Key Benefits
- Direct OEM Compatibility: Specifically designed for Laars Endurance models EBP, EDN, and EDP (110-175), ensuring seamless integration with existing wiring harnesses.
- Fixed Temperature Precision: Factory-set 230°F high-limit trip point provides consistent protection against runaway thermal conditions in the heat exchanger.
- Automatic Reset Functionality: Features an auto-reset design that restores the circuit once the system cools, reducing unnecessary manual service calls for temporary over-temperature events.
- Heavy-Duty Construction: Built to withstand the high-cycling environments of modern hydronic boilers, maintaining safety limit accuracy over thousands of cycles.
Common Questions
How do I know if the Laars 2400-550 limit switch has failed?
A faulty limit switch often manifests as a "limit circuit open" error code on the control board or a burner that refuses to fire despite a call for heat. You should test for continuity across the terminals when the system is cool; a lack of continuity indicates the internal contacts are stuck open or the bimetal disc is fatigued.
Can I use an adjustable limit switch to replace the 2400-550?
It is not recommended. The 2400-550 is a fixed-temperature safety device engineered specifically for the thermal profile of Laars Endurance boilers. Swapping it for a generic adjustable control can compromise the safety of the unit and may violate local mechanical codes.
Why does my limit switch keep tripping even though the pump is running?
Frequent tripping is often caused by restricted flow, a scaled heat exchanger, or a failing internal bypass. If the limit switch is functioning correctly but the system is reaching 230°F, investigate the primary loop flow rate and check for air-bound sections in the piping.
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.
Original: $116.14
-65%$116.14
$40.65Laars Heating Systems 2400-550 Limit Switch
The Laars Heating Systems 2400-550 is a critical OEM boiler part engineered for high-limit temperature protection in residential and light commercial hydronic systems. This 200-230F AUTO Limit Switch functions as a fail-safe high-limit control, designed to interrupt the burner circuit if heat exchanger temperatures exceed safe operational parameters. Specifically calibrated for the Laars Endurance EBP, EDN, and EDP series (sizes 110-175), this exhaust limit switch or safety limit endurance control ensures the system remains within its thermal structural limits, preventing heat exchanger damage and hazardous overheating conditions.
For technicians servicing Laars heating systems, this bimetal disc limit switch features an automatic reset mechanism, allowing the system to resume operation once temperatures have dropped below the differential threshold. With a 3/4-inch diameter footprint and a robust 230°F trip point, the 2400-550 is a direct replacement furnace limit switch that maintains the integrity of the safety string. Utilizing genuine Laars boiler parts like this high limit safety control ensures precise compatibility and long-term reliability in demanding HVACR applications.
Key Benefits
- Direct OEM Compatibility: Specifically designed for Laars Endurance models EBP, EDN, and EDP (110-175), ensuring seamless integration with existing wiring harnesses.
- Fixed Temperature Precision: Factory-set 230°F high-limit trip point provides consistent protection against runaway thermal conditions in the heat exchanger.
- Automatic Reset Functionality: Features an auto-reset design that restores the circuit once the system cools, reducing unnecessary manual service calls for temporary over-temperature events.
- Heavy-Duty Construction: Built to withstand the high-cycling environments of modern hydronic boilers, maintaining safety limit accuracy over thousands of cycles.
Common Questions
How do I know if the Laars 2400-550 limit switch has failed?
A faulty limit switch often manifests as a "limit circuit open" error code on the control board or a burner that refuses to fire despite a call for heat. You should test for continuity across the terminals when the system is cool; a lack of continuity indicates the internal contacts are stuck open or the bimetal disc is fatigued.
Can I use an adjustable limit switch to replace the 2400-550?
It is not recommended. The 2400-550 is a fixed-temperature safety device engineered specifically for the thermal profile of Laars Endurance boilers. Swapping it for a generic adjustable control can compromise the safety of the unit and may violate local mechanical codes.
Why does my limit switch keep tripping even though the pump is running?
Frequent tripping is often caused by restricted flow, a scaled heat exchanger, or a failing internal bypass. If the limit switch is functioning correctly but the system is reaching 230°F, investigate the primary loop flow rate and check for air-bound sections in the piping.
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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Description
The Laars Heating Systems 2400-550 is a critical OEM boiler part engineered for high-limit temperature protection in residential and light commercial hydronic systems. This 200-230F AUTO Limit Switch functions as a fail-safe high-limit control, designed to interrupt the burner circuit if heat exchanger temperatures exceed safe operational parameters. Specifically calibrated for the Laars Endurance EBP, EDN, and EDP series (sizes 110-175), this exhaust limit switch or safety limit endurance control ensures the system remains within its thermal structural limits, preventing heat exchanger damage and hazardous overheating conditions.
For technicians servicing Laars heating systems, this bimetal disc limit switch features an automatic reset mechanism, allowing the system to resume operation once temperatures have dropped below the differential threshold. With a 3/4-inch diameter footprint and a robust 230°F trip point, the 2400-550 is a direct replacement furnace limit switch that maintains the integrity of the safety string. Utilizing genuine Laars boiler parts like this high limit safety control ensures precise compatibility and long-term reliability in demanding HVACR applications.
Key Benefits
- Direct OEM Compatibility: Specifically designed for Laars Endurance models EBP, EDN, and EDP (110-175), ensuring seamless integration with existing wiring harnesses.
- Fixed Temperature Precision: Factory-set 230°F high-limit trip point provides consistent protection against runaway thermal conditions in the heat exchanger.
- Automatic Reset Functionality: Features an auto-reset design that restores the circuit once the system cools, reducing unnecessary manual service calls for temporary over-temperature events.
- Heavy-Duty Construction: Built to withstand the high-cycling environments of modern hydronic boilers, maintaining safety limit accuracy over thousands of cycles.
Common Questions
How do I know if the Laars 2400-550 limit switch has failed?
A faulty limit switch often manifests as a "limit circuit open" error code on the control board or a burner that refuses to fire despite a call for heat. You should test for continuity across the terminals when the system is cool; a lack of continuity indicates the internal contacts are stuck open or the bimetal disc is fatigued.
Can I use an adjustable limit switch to replace the 2400-550?
It is not recommended. The 2400-550 is a fixed-temperature safety device engineered specifically for the thermal profile of Laars Endurance boilers. Swapping it for a generic adjustable control can compromise the safety of the unit and may violate local mechanical codes.
Why does my limit switch keep tripping even though the pump is running?
Frequent tripping is often caused by restricted flow, a scaled heat exchanger, or a failing internal bypass. If the limit switch is functioning correctly but the system is reaching 230°F, investigate the primary loop flow rate and check for air-bound sections in the piping.
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.
