Lennox 73K19 Limit Switch
The Lennox 73K19 is a technical-grade L160-30F Limit Switch engineered for critical temperature oversight in residential and commercial HVAC furnace units. This OEM disc-style limit control features a normally closed (NC) circuit configuration and utilizes an automatic reset mechanism for system continuity. As a primary safety component, the switch is calibrated to open the electrical circuit when the sensed temperature reaches its high-limit cutout of 160°F, effectively halting furnace operation to prevent heat exchanger damage and unsafe conditions. The bypass completes again once the temperature drops 30°F to its 130°F resumption point (cut-in temperature). Designed for the T-O-D 60T series, this switch is compatible with various Lennox G23Q series models and replaces older part numbers such as 73K1901 and 130814. Professional installation ensures high-heat protection and maximizes HVAC equipment performance across Allied, Armstrong, and Ducane systems.
Key Benefits:- Precise Safety Control: Features a fixed 160°F opening temperature to prevent system overheating.
- Automatic Reset Functionality: Resets the circuit at 130°F, eliminating the need for manual intervention during standard cycling.
- Wide OEM Compatibility: Directly replaces part numbers 73K19, 73K1901, A1317, and L160-30F.
- Industrial TOD 60T Series: Built for the high-duty cycles of HVAC blower and furnace assemblies.
- Normally Closed Logic: Ensures the heating circuit remains active only within safe operating parameters.
What are the cut-out and cut-in temperatures for this switch?
The switch is designed to open at 160°F (cut-out) and close at 130°F (cut-in), providing a 30°F differential for equipment cooling.
Does this limit switch require manual resetting if it trips?
No, this model features an automatic reset, meaning it will restore the circuit once the furnace internal temperature drops back down to 130°F.
Is this switch compatible with Lennox G23 series furnaces?
Yes, this 73K19 limit switch is a standard replacement for Lennox G23Q2 and G23Q4/5 series models, among other Allied Air brands.
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: $23.66
-65%$23.66
$8.28Lennox 73K19 Limit Switch
The Lennox 73K19 is a technical-grade L160-30F Limit Switch engineered for critical temperature oversight in residential and commercial HVAC furnace units. This OEM disc-style limit control features a normally closed (NC) circuit configuration and utilizes an automatic reset mechanism for system continuity. As a primary safety component, the switch is calibrated to open the electrical circuit when the sensed temperature reaches its high-limit cutout of 160°F, effectively halting furnace operation to prevent heat exchanger damage and unsafe conditions. The bypass completes again once the temperature drops 30°F to its 130°F resumption point (cut-in temperature). Designed for the T-O-D 60T series, this switch is compatible with various Lennox G23Q series models and replaces older part numbers such as 73K1901 and 130814. Professional installation ensures high-heat protection and maximizes HVAC equipment performance across Allied, Armstrong, and Ducane systems.
Key Benefits:- Precise Safety Control: Features a fixed 160°F opening temperature to prevent system overheating.
- Automatic Reset Functionality: Resets the circuit at 130°F, eliminating the need for manual intervention during standard cycling.
- Wide OEM Compatibility: Directly replaces part numbers 73K19, 73K1901, A1317, and L160-30F.
- Industrial TOD 60T Series: Built for the high-duty cycles of HVAC blower and furnace assemblies.
- Normally Closed Logic: Ensures the heating circuit remains active only within safe operating parameters.
What are the cut-out and cut-in temperatures for this switch?
The switch is designed to open at 160°F (cut-out) and close at 130°F (cut-in), providing a 30°F differential for equipment cooling.
Does this limit switch require manual resetting if it trips?
No, this model features an automatic reset, meaning it will restore the circuit once the furnace internal temperature drops back down to 130°F.
Is this switch compatible with Lennox G23 series furnaces?
Yes, this 73K19 limit switch is a standard replacement for Lennox G23Q2 and G23Q4/5 series models, among other Allied Air brands.
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
The Lennox 73K19 is a technical-grade L160-30F Limit Switch engineered for critical temperature oversight in residential and commercial HVAC furnace units. This OEM disc-style limit control features a normally closed (NC) circuit configuration and utilizes an automatic reset mechanism for system continuity. As a primary safety component, the switch is calibrated to open the electrical circuit when the sensed temperature reaches its high-limit cutout of 160°F, effectively halting furnace operation to prevent heat exchanger damage and unsafe conditions. The bypass completes again once the temperature drops 30°F to its 130°F resumption point (cut-in temperature). Designed for the T-O-D 60T series, this switch is compatible with various Lennox G23Q series models and replaces older part numbers such as 73K1901 and 130814. Professional installation ensures high-heat protection and maximizes HVAC equipment performance across Allied, Armstrong, and Ducane systems.
Key Benefits:- Precise Safety Control: Features a fixed 160°F opening temperature to prevent system overheating.
- Automatic Reset Functionality: Resets the circuit at 130°F, eliminating the need for manual intervention during standard cycling.
- Wide OEM Compatibility: Directly replaces part numbers 73K19, 73K1901, A1317, and L160-30F.
- Industrial TOD 60T Series: Built for the high-duty cycles of HVAC blower and furnace assemblies.
- Normally Closed Logic: Ensures the heating circuit remains active only within safe operating parameters.
What are the cut-out and cut-in temperatures for this switch?
The switch is designed to open at 160°F (cut-out) and close at 130°F (cut-in), providing a 30°F differential for equipment cooling.
Does this limit switch require manual resetting if it trips?
No, this model features an automatic reset, meaning it will restore the circuit once the furnace internal temperature drops back down to 130°F.
Is this switch compatible with Lennox G23 series furnaces?
Yes, this 73K19 limit switch is a standard replacement for Lennox G23Q2 and G23Q4/5 series models, among other Allied Air brands.
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.
