Lennox 42J05 Limit Switch
Maintain precise thermal regulation in your commercial or residential equipment with the Lennox 42J05 Limit Switch. This genuine OEM Lennox 42J05 component is a fixed temperature limit switch designed to protect the system by interrupting the circuit when the temperature reaches the 170°F threshold. Engineered with an auto reset feature (L170-40F), it restores operation once the temperature drops below the differential, typically around 130°F, ensuring continuous protection without manual intervention. This 130-170F AUTO limit switch is a critical safety bypass for various Lennox HVAC systems including GCS16, LGB036H, and GCS20R series units. Its snap-disc construction provides reliable, surface-mounted thermal sensing to prevent heat exchanger damage and hazardous overheating conditions. When replacing high-limit controls, verified Lennox HVAC replacement parts like the 42J05 ensure exact mounting alignment and electrical terminal compatibility for professional service and maintenance calls.
Key Benefits
- Precision Thermal Calibration: Factory-set to open at 170°F and close at 130°F for accurate high-limit protection.
- Integrated Auto-Reset Logic: Eliminates downtime and manual resets by automatically closing the circuit after the heat exchanger cools.
- Broad Model Compatibility: Drop-in replacement for Lennox 42J0501 across GCS16, GCS20, and LGB product lines.
- OEM Safety Reliability: High-grade HVAC high limit switch construction ensures long-term resistance to thermal cycling.
Common Questions
What are the specific temperature settings for the Lennox 42J05?
The 42J05 is an L170-40F switch, meaning it is designed to open at 170°F and has a 40°F differential, typically closing (resetting) at 130°F.
Is this a manual or automatic reset switch?
This is an auto-reset limit switch. It does not require a technician to manually push a button; it will re-engage once the temperature reaches the lower limit.
Can I use this for GCS16 and GCS20 series furnaces?
Yes, this Lennox furnace limit switch is a verified OEM replacement for GCS16-024 through GCS16-270 and GCS20R series units.
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.
Lennox 42J05 Limit Switch
Maintain precise thermal regulation in your commercial or residential equipment with the Lennox 42J05 Limit Switch. This genuine OEM Lennox 42J05 component is a fixed temperature limit switch designed to protect the system by interrupting the circuit when the temperature reaches the 170°F threshold. Engineered with an auto reset feature (L170-40F), it restores operation once the temperature drops below the differential, typically around 130°F, ensuring continuous protection without manual intervention. This 130-170F AUTO limit switch is a critical safety bypass for various Lennox HVAC systems including GCS16, LGB036H, and GCS20R series units. Its snap-disc construction provides reliable, surface-mounted thermal sensing to prevent heat exchanger damage and hazardous overheating conditions. When replacing high-limit controls, verified Lennox HVAC replacement parts like the 42J05 ensure exact mounting alignment and electrical terminal compatibility for professional service and maintenance calls.
Key Benefits
- Precision Thermal Calibration: Factory-set to open at 170°F and close at 130°F for accurate high-limit protection.
- Integrated Auto-Reset Logic: Eliminates downtime and manual resets by automatically closing the circuit after the heat exchanger cools.
- Broad Model Compatibility: Drop-in replacement for Lennox 42J0501 across GCS16, GCS20, and LGB product lines.
- OEM Safety Reliability: High-grade HVAC high limit switch construction ensures long-term resistance to thermal cycling.
Common Questions
What are the specific temperature settings for the Lennox 42J05?
The 42J05 is an L170-40F switch, meaning it is designed to open at 170°F and has a 40°F differential, typically closing (resetting) at 130°F.
Is this a manual or automatic reset switch?
This is an auto-reset limit switch. It does not require a technician to manually push a button; it will re-engage once the temperature reaches the lower limit.
Can I use this for GCS16 and GCS20 series furnaces?
Yes, this Lennox furnace limit switch is a verified OEM replacement for GCS16-024 through GCS16-270 and GCS20R series units.
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.
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
Maintain precise thermal regulation in your commercial or residential equipment with the Lennox 42J05 Limit Switch. This genuine OEM Lennox 42J05 component is a fixed temperature limit switch designed to protect the system by interrupting the circuit when the temperature reaches the 170°F threshold. Engineered with an auto reset feature (L170-40F), it restores operation once the temperature drops below the differential, typically around 130°F, ensuring continuous protection without manual intervention. This 130-170F AUTO limit switch is a critical safety bypass for various Lennox HVAC systems including GCS16, LGB036H, and GCS20R series units. Its snap-disc construction provides reliable, surface-mounted thermal sensing to prevent heat exchanger damage and hazardous overheating conditions. When replacing high-limit controls, verified Lennox HVAC replacement parts like the 42J05 ensure exact mounting alignment and electrical terminal compatibility for professional service and maintenance calls.
Key Benefits
- Precision Thermal Calibration: Factory-set to open at 170°F and close at 130°F for accurate high-limit protection.
- Integrated Auto-Reset Logic: Eliminates downtime and manual resets by automatically closing the circuit after the heat exchanger cools.
- Broad Model Compatibility: Drop-in replacement for Lennox 42J0501 across GCS16, GCS20, and LGB product lines.
- OEM Safety Reliability: High-grade HVAC high limit switch construction ensures long-term resistance to thermal cycling.
Common Questions
What are the specific temperature settings for the Lennox 42J05?
The 42J05 is an L170-40F switch, meaning it is designed to open at 170°F and has a 40°F differential, typically closing (resetting) at 130°F.
Is this a manual or automatic reset switch?
This is an auto-reset limit switch. It does not require a technician to manually push a button; it will re-engage once the temperature reaches the lower limit.
Can I use this for GCS16 and GCS20 series furnaces?
Yes, this Lennox furnace limit switch is a verified OEM replacement for GCS16-024 through GCS16-270 and GCS20R series units.
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.
