Lennox 73W19 Limit Switch
The Lennox 73W19 is a critical 155-30V OEM replacement limit switch engineered for precision temperature monitoring in high-efficiency furnace applications. As a direct replacement for Lennox 102857-06, this high-limit safety control is designed to break the electrical circuit if the heat exchanger temperatures exceed the 155-degree Fahrenheit threshold. This Lennox furnace limit switch prevents thermal stress on the heat exchanger and ensures the blower assembly is functioning within safe operational parameters. For technicians servicing EL296, SLP98, or G61MPV series units, maintaining the specific L0155-30 limit switch calibration is essential for preventing nuisance tripping or hazardous overheating conditions. This genuine HVAC furnace safety switch provides the exact resistance and response time required by the original control board logic, ensuring seamless integration with existing Lennox HVAC replacement parts without the risk of compatibility errors typical of universal after-market controls.
Key Benefits for Technicians- Precise Thermal Calibration: Fixed at a 155-degree trip point with a 30-degree differential for accurate cycling and system protection.
- OEM Compatibility: Exact replacement for Lennox 73W19 and 102857-06, eliminating the need for mounting bracket modifications in the field.
- Reliable Circuit Protection: Prevents heat exchanger damage by interrupting the gas valve circuit during restricted airflow or filter clogs.
- Industrial Build Quality: Constructed with high-grade bimetal sensing elements to withstand the high-cycle demands of residential and commercial heating.
Is the 73W19 an manual or auto-reset switch?
The Lennox 73W19 is an automatic reset limit switch. Once the heat exchanger cools down by the specified 30-degree differential, the switch will close the circuit to allow for the next heating cycle.
What causes this limit switch to trip repeatedly?
Repeated tripping of the Lennox 155-30V limit switch is usually indicative of airflow issues, such as a dirty air filter, blocked return air ducts, or a failing blower motor. If the switch stays open, it must be tested for continuity.
Can I use a universal 155-degree switch instead?
While temperature ratings may match, using the genuine Lennox OEM limit switch ensures the insertion depth and mounting orientation match the factory specifications, which is vital for sensing the hottest part of the heat exchanger correctly.
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: $34.92
-65%$34.92
$12.22Lennox 73W19 Limit Switch
The Lennox 73W19 is a critical 155-30V OEM replacement limit switch engineered for precision temperature monitoring in high-efficiency furnace applications. As a direct replacement for Lennox 102857-06, this high-limit safety control is designed to break the electrical circuit if the heat exchanger temperatures exceed the 155-degree Fahrenheit threshold. This Lennox furnace limit switch prevents thermal stress on the heat exchanger and ensures the blower assembly is functioning within safe operational parameters. For technicians servicing EL296, SLP98, or G61MPV series units, maintaining the specific L0155-30 limit switch calibration is essential for preventing nuisance tripping or hazardous overheating conditions. This genuine HVAC furnace safety switch provides the exact resistance and response time required by the original control board logic, ensuring seamless integration with existing Lennox HVAC replacement parts without the risk of compatibility errors typical of universal after-market controls.
Key Benefits for Technicians- Precise Thermal Calibration: Fixed at a 155-degree trip point with a 30-degree differential for accurate cycling and system protection.
- OEM Compatibility: Exact replacement for Lennox 73W19 and 102857-06, eliminating the need for mounting bracket modifications in the field.
- Reliable Circuit Protection: Prevents heat exchanger damage by interrupting the gas valve circuit during restricted airflow or filter clogs.
- Industrial Build Quality: Constructed with high-grade bimetal sensing elements to withstand the high-cycle demands of residential and commercial heating.
Is the 73W19 an manual or auto-reset switch?
The Lennox 73W19 is an automatic reset limit switch. Once the heat exchanger cools down by the specified 30-degree differential, the switch will close the circuit to allow for the next heating cycle.
What causes this limit switch to trip repeatedly?
Repeated tripping of the Lennox 155-30V limit switch is usually indicative of airflow issues, such as a dirty air filter, blocked return air ducts, or a failing blower motor. If the switch stays open, it must be tested for continuity.
Can I use a universal 155-degree switch instead?
While temperature ratings may match, using the genuine Lennox OEM limit switch ensures the insertion depth and mounting orientation match the factory specifications, which is vital for sensing the hottest part of the heat exchanger correctly.
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 Lennox 73W19 is a critical 155-30V OEM replacement limit switch engineered for precision temperature monitoring in high-efficiency furnace applications. As a direct replacement for Lennox 102857-06, this high-limit safety control is designed to break the electrical circuit if the heat exchanger temperatures exceed the 155-degree Fahrenheit threshold. This Lennox furnace limit switch prevents thermal stress on the heat exchanger and ensures the blower assembly is functioning within safe operational parameters. For technicians servicing EL296, SLP98, or G61MPV series units, maintaining the specific L0155-30 limit switch calibration is essential for preventing nuisance tripping or hazardous overheating conditions. This genuine HVAC furnace safety switch provides the exact resistance and response time required by the original control board logic, ensuring seamless integration with existing Lennox HVAC replacement parts without the risk of compatibility errors typical of universal after-market controls.
Key Benefits for Technicians- Precise Thermal Calibration: Fixed at a 155-degree trip point with a 30-degree differential for accurate cycling and system protection.
- OEM Compatibility: Exact replacement for Lennox 73W19 and 102857-06, eliminating the need for mounting bracket modifications in the field.
- Reliable Circuit Protection: Prevents heat exchanger damage by interrupting the gas valve circuit during restricted airflow or filter clogs.
- Industrial Build Quality: Constructed with high-grade bimetal sensing elements to withstand the high-cycle demands of residential and commercial heating.
Is the 73W19 an manual or auto-reset switch?
The Lennox 73W19 is an automatic reset limit switch. Once the heat exchanger cools down by the specified 30-degree differential, the switch will close the circuit to allow for the next heating cycle.
What causes this limit switch to trip repeatedly?
Repeated tripping of the Lennox 155-30V limit switch is usually indicative of airflow issues, such as a dirty air filter, blocked return air ducts, or a failing blower motor. If the switch stays open, it must be tested for continuity.
Can I use a universal 155-degree switch instead?
While temperature ratings may match, using the genuine Lennox OEM limit switch ensures the insertion depth and mounting orientation match the factory specifications, which is vital for sensing the hottest part of the heat exchanger correctly.
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.
