Lennox 36K30 Limit Switch
The Lennox 36K30 Limit Switch is a critical OEM replacement part engineered for high-temperature regulation in residential and commercial gas furnaces. This auto limit switch features a 7-inch insertion length, ensuring the bimetal sensor is positioned deep within the heat exchanger airflow to accurately monitor discharge air temperatures. Configured with a 190°F to 220°F temperature range, the Lennox 36K30 acts as a primary safety control, automatically opening the circuit to de-energize the gas valve if the plenum temperature exceeds safe operating thresholds. Designed specifically for compatibility with Lennox HVAC systems, this high-limit control prevents component fatigue and potential hazards caused by restricted airflow or secondary heat exchanger failure. For technicians performing system diagnostics, this genuine Lennox part provides the exact electrical specifications and response times required to restore equipment to factory standards without the calibration risks associated with universal alternatives.
Technical Benefits:
- Precise Thermal Protection: Set point range of 190°F to 220°F ensures the system operates within safe thermal parameters.
- Optimized Probe Depth: The 7" insertion sensor captures accurate internal temperatures, reducing nuisance tripping or delayed responses.
- Automatic Reset: The switch restores system operation once temperatures drop below the safety limit, maintaining consistent climate control.
- HVAC System Integrity: Using a genuine OEM 36K30 ensures the electrical load and mounting footprints match the original equipment manufacturer’s specifications.
Common Questions & Answers:
What causes a Lennox furnace to trip the 36K30 limit switch?
Frequent tripping is usually caused by restricted airflow, such as a dirty air filter, blocked return grilles, or a failing blower motor, which allows heat to build up beyond the 220°F threshold.
Can I replace a 7-inch insertion switch with a shorter probe?
No. The 7-inch length is specific to the heat exchanger geometry. A shorter probe may not sit in the primary air path, leading to dangerously delayed response times.
Is the 36K30 limit switch compatible with other brands?
While functionally similar to other high-limit controls, the 36K30 is calibrated specifically for the BTU output and airflow profiles of Lennox-branded equipment.
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: $99.89
-65%$99.89
$34.96Lennox 36K30 Limit Switch
The Lennox 36K30 Limit Switch is a critical OEM replacement part engineered for high-temperature regulation in residential and commercial gas furnaces. This auto limit switch features a 7-inch insertion length, ensuring the bimetal sensor is positioned deep within the heat exchanger airflow to accurately monitor discharge air temperatures. Configured with a 190°F to 220°F temperature range, the Lennox 36K30 acts as a primary safety control, automatically opening the circuit to de-energize the gas valve if the plenum temperature exceeds safe operating thresholds. Designed specifically for compatibility with Lennox HVAC systems, this high-limit control prevents component fatigue and potential hazards caused by restricted airflow or secondary heat exchanger failure. For technicians performing system diagnostics, this genuine Lennox part provides the exact electrical specifications and response times required to restore equipment to factory standards without the calibration risks associated with universal alternatives.
Technical Benefits:
- Precise Thermal Protection: Set point range of 190°F to 220°F ensures the system operates within safe thermal parameters.
- Optimized Probe Depth: The 7" insertion sensor captures accurate internal temperatures, reducing nuisance tripping or delayed responses.
- Automatic Reset: The switch restores system operation once temperatures drop below the safety limit, maintaining consistent climate control.
- HVAC System Integrity: Using a genuine OEM 36K30 ensures the electrical load and mounting footprints match the original equipment manufacturer’s specifications.
Common Questions & Answers:
What causes a Lennox furnace to trip the 36K30 limit switch?
Frequent tripping is usually caused by restricted airflow, such as a dirty air filter, blocked return grilles, or a failing blower motor, which allows heat to build up beyond the 220°F threshold.
Can I replace a 7-inch insertion switch with a shorter probe?
No. The 7-inch length is specific to the heat exchanger geometry. A shorter probe may not sit in the primary air path, leading to dangerously delayed response times.
Is the 36K30 limit switch compatible with other brands?
While functionally similar to other high-limit controls, the 36K30 is calibrated specifically for the BTU output and airflow profiles of Lennox-branded equipment.
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 36K30 Limit Switch is a critical OEM replacement part engineered for high-temperature regulation in residential and commercial gas furnaces. This auto limit switch features a 7-inch insertion length, ensuring the bimetal sensor is positioned deep within the heat exchanger airflow to accurately monitor discharge air temperatures. Configured with a 190°F to 220°F temperature range, the Lennox 36K30 acts as a primary safety control, automatically opening the circuit to de-energize the gas valve if the plenum temperature exceeds safe operating thresholds. Designed specifically for compatibility with Lennox HVAC systems, this high-limit control prevents component fatigue and potential hazards caused by restricted airflow or secondary heat exchanger failure. For technicians performing system diagnostics, this genuine Lennox part provides the exact electrical specifications and response times required to restore equipment to factory standards without the calibration risks associated with universal alternatives.
Technical Benefits:
- Precise Thermal Protection: Set point range of 190°F to 220°F ensures the system operates within safe thermal parameters.
- Optimized Probe Depth: The 7" insertion sensor captures accurate internal temperatures, reducing nuisance tripping or delayed responses.
- Automatic Reset: The switch restores system operation once temperatures drop below the safety limit, maintaining consistent climate control.
- HVAC System Integrity: Using a genuine OEM 36K30 ensures the electrical load and mounting footprints match the original equipment manufacturer’s specifications.
Common Questions & Answers:
What causes a Lennox furnace to trip the 36K30 limit switch?
Frequent tripping is usually caused by restricted airflow, such as a dirty air filter, blocked return grilles, or a failing blower motor, which allows heat to build up beyond the 220°F threshold.
Can I replace a 7-inch insertion switch with a shorter probe?
No. The 7-inch length is specific to the heat exchanger geometry. A shorter probe may not sit in the primary air path, leading to dangerously delayed response times.
Is the 36K30 limit switch compatible with other brands?
While functionally similar to other high-limit controls, the 36K30 is calibrated specifically for the BTU output and airflow profiles of Lennox-branded equipment.
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.
