Lennox 50L98 Limit Kit
The Lennox 50L98 Limit Kit is a critical OEM replacement part designed for secondary high-limit protection in residential and commercial furnaces. As a secondary limit kit, this component functions as a vital safety redundancy, monitoring heat exchanger temperatures to prevent thermal runaway and potential manifold damage. Field-proven for Lennox 80MGF and 80MGF2 series units, this kit—also identified by part number LB-95368A—is essential when the primary limit fails to trip or when airflow obstructions cause localized overheating within the cabinet.
For technicians performing furnace limit switch replacement, the 50L98 ensures the burner circuit opens if internal temperatures exceed factory safety thresholds. The compact 1/2" x 7/8" x 1/4" sensor profile allows for precise placement near the secondary heat exchanger, maintaining optimal system pressure and airflow regulation. Integrating this HVAC safety component during standard maintenance or repair restores the integrity of the heating cycle and protects sensitive internal electronics from excessive radiant heat.
Key Benefits- Enhanced Terminal Protection: Prevents system overheating by establishing a secondary thermal cutoff point.
- Wide Compatibility: Direct fit for multiple Lennox residential heating models including the 80MGF series and commercial air handlers.
- Accurate Thermal Response: Engineered to specific OEM tolerances for reliable HVAC temperature control.
- Durable Construction: Built with high-grade materials to withstand the high-temperature environment of the furnace plenum.
- System Longevity: Reduces the risk of premature component failure by ensuring the system operates within safe thermal parameters.
When should the secondary limit be replaced?
The secondary limit should be replaced if the furnace is short-cycling or if the switch remains open (tripped) after the heat exchanger has cooled. Persistent tripping often indicates an airflow issue, such as a clogged filter or a failing blower motor.
Is the 50L98 compatible with all Lennox furnaces?
While the 50L98 is widely used in 80MGF series units, technicians should verify the specific Lennox replacement part number in the original equipment manual to ensure the temperature set point matches the factory requirements.
Can I bypass this limit for testing purposes?
Bypassing a safety limit is never recommended for permanent operation. Use a multimeter to check for continuity across the terminals; if the circuit is open at room temperature, the switch is defective and requires immediate replacement.
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: $99.31
-65%$99.31
$34.76Lennox 50L98 Limit Kit
The Lennox 50L98 Limit Kit is a critical OEM replacement part designed for secondary high-limit protection in residential and commercial furnaces. As a secondary limit kit, this component functions as a vital safety redundancy, monitoring heat exchanger temperatures to prevent thermal runaway and potential manifold damage. Field-proven for Lennox 80MGF and 80MGF2 series units, this kit—also identified by part number LB-95368A—is essential when the primary limit fails to trip or when airflow obstructions cause localized overheating within the cabinet.
For technicians performing furnace limit switch replacement, the 50L98 ensures the burner circuit opens if internal temperatures exceed factory safety thresholds. The compact 1/2" x 7/8" x 1/4" sensor profile allows for precise placement near the secondary heat exchanger, maintaining optimal system pressure and airflow regulation. Integrating this HVAC safety component during standard maintenance or repair restores the integrity of the heating cycle and protects sensitive internal electronics from excessive radiant heat.
Key Benefits- Enhanced Terminal Protection: Prevents system overheating by establishing a secondary thermal cutoff point.
- Wide Compatibility: Direct fit for multiple Lennox residential heating models including the 80MGF series and commercial air handlers.
- Accurate Thermal Response: Engineered to specific OEM tolerances for reliable HVAC temperature control.
- Durable Construction: Built with high-grade materials to withstand the high-temperature environment of the furnace plenum.
- System Longevity: Reduces the risk of premature component failure by ensuring the system operates within safe thermal parameters.
When should the secondary limit be replaced?
The secondary limit should be replaced if the furnace is short-cycling or if the switch remains open (tripped) after the heat exchanger has cooled. Persistent tripping often indicates an airflow issue, such as a clogged filter or a failing blower motor.
Is the 50L98 compatible with all Lennox furnaces?
While the 50L98 is widely used in 80MGF series units, technicians should verify the specific Lennox replacement part number in the original equipment manual to ensure the temperature set point matches the factory requirements.
Can I bypass this limit for testing purposes?
Bypassing a safety limit is never recommended for permanent operation. Use a multimeter to check for continuity across the terminals; if the circuit is open at room temperature, the switch is defective and requires immediate replacement.
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 50L98 Limit Kit is a critical OEM replacement part designed for secondary high-limit protection in residential and commercial furnaces. As a secondary limit kit, this component functions as a vital safety redundancy, monitoring heat exchanger temperatures to prevent thermal runaway and potential manifold damage. Field-proven for Lennox 80MGF and 80MGF2 series units, this kit—also identified by part number LB-95368A—is essential when the primary limit fails to trip or when airflow obstructions cause localized overheating within the cabinet.
For technicians performing furnace limit switch replacement, the 50L98 ensures the burner circuit opens if internal temperatures exceed factory safety thresholds. The compact 1/2" x 7/8" x 1/4" sensor profile allows for precise placement near the secondary heat exchanger, maintaining optimal system pressure and airflow regulation. Integrating this HVAC safety component during standard maintenance or repair restores the integrity of the heating cycle and protects sensitive internal electronics from excessive radiant heat.
Key Benefits- Enhanced Terminal Protection: Prevents system overheating by establishing a secondary thermal cutoff point.
- Wide Compatibility: Direct fit for multiple Lennox residential heating models including the 80MGF series and commercial air handlers.
- Accurate Thermal Response: Engineered to specific OEM tolerances for reliable HVAC temperature control.
- Durable Construction: Built with high-grade materials to withstand the high-temperature environment of the furnace plenum.
- System Longevity: Reduces the risk of premature component failure by ensuring the system operates within safe thermal parameters.
When should the secondary limit be replaced?
The secondary limit should be replaced if the furnace is short-cycling or if the switch remains open (tripped) after the heat exchanger has cooled. Persistent tripping often indicates an airflow issue, such as a clogged filter or a failing blower motor.
Is the 50L98 compatible with all Lennox furnaces?
While the 50L98 is widely used in 80MGF series units, technicians should verify the specific Lennox replacement part number in the original equipment manual to ensure the temperature set point matches the factory requirements.
Can I bypass this limit for testing purposes?
Bypassing a safety limit is never recommended for permanent operation. Use a multimeter to check for continuity across the terminals; if the circuit is open at room temperature, the switch is defective and requires immediate replacement.
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.
