Lennox 75W43 Thermal Switch
The Lennox 75W43 is a high-precision compressor thermal switch engineered for critical temperature regulation in industrial and residential HVACR systems. As a genuine OEM component (Manufacturer Number 103048-01), this HVAC thermal protection switch prevents catastrophic equipment failure by monitoring operational heat levels. It features a specified open temperature range of 239°F to 257°F, which interrupts the electrical circuit to protect the compressor from overheating. Once the system cools to the close temperature range of 151°F to 187°F, the switch resets to restore normal operation. Built with 71-inch leads, this switch offers versatile installation for various Lennox replacement parts applications, including LGH180U4, LGM180U4, and LCH240H4 units. By using this rugged, factory-spec limit control switch, technicians ensure optimal system efficiency and maintain the original performance ratings of the cooling equipment without the risks associated with universal after-market alternatives.
Key Benefits- Precise Overheat Protection: Triggers circuit interruption at 239°F-257°F to safeguard the compressor from thermal damage.
- Automatic Reset Logic: Resets between 151°F-187°F to ensure system uptime once safe operating conditions are met.
- Extended Installation Reach: Includes 71-inch leads for flexible routing and secure connection in complex cabinet layouts.
- OEM Compatibility: Specifically designed for Lennox and Allied models to maintain factory-grade reliability and airflow efficiency.
- Industrial-Grade Durability: Constructed to withstand high-cycle environments in furnaces and heat pump systems.
What causes the Lennox 75W43 thermal switch to trip frequently?
Frequent tripping usually indicates an overheating compressor, often caused by restricted airflow, refrigerant undercharge, or a failing start capacitor. If the switch opens, it is performing its primary function of protecting the motor windings.
Can I use this switch as a universal replacement for other brands?
While the electrical specs might appear similar, this is a dedicated Lennox OEM part. For proper fitment and to ensure the trip/reset points match your system's design parameters, this switch should only be used on compatible Lennox and Allied equipment.
Are the leads long enough for rooftop units?
Yes, the 71-inch (nearly 6 feet) lead length is specifically designed to accommodate the larger footprints of commercial package units and split systems where the controller and compressor are positioned further apart.
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: $26.30
-65%$26.30
$9.21Lennox 75W43 Thermal Switch
The Lennox 75W43 is a high-precision compressor thermal switch engineered for critical temperature regulation in industrial and residential HVACR systems. As a genuine OEM component (Manufacturer Number 103048-01), this HVAC thermal protection switch prevents catastrophic equipment failure by monitoring operational heat levels. It features a specified open temperature range of 239°F to 257°F, which interrupts the electrical circuit to protect the compressor from overheating. Once the system cools to the close temperature range of 151°F to 187°F, the switch resets to restore normal operation. Built with 71-inch leads, this switch offers versatile installation for various Lennox replacement parts applications, including LGH180U4, LGM180U4, and LCH240H4 units. By using this rugged, factory-spec limit control switch, technicians ensure optimal system efficiency and maintain the original performance ratings of the cooling equipment without the risks associated with universal after-market alternatives.
Key Benefits- Precise Overheat Protection: Triggers circuit interruption at 239°F-257°F to safeguard the compressor from thermal damage.
- Automatic Reset Logic: Resets between 151°F-187°F to ensure system uptime once safe operating conditions are met.
- Extended Installation Reach: Includes 71-inch leads for flexible routing and secure connection in complex cabinet layouts.
- OEM Compatibility: Specifically designed for Lennox and Allied models to maintain factory-grade reliability and airflow efficiency.
- Industrial-Grade Durability: Constructed to withstand high-cycle environments in furnaces and heat pump systems.
What causes the Lennox 75W43 thermal switch to trip frequently?
Frequent tripping usually indicates an overheating compressor, often caused by restricted airflow, refrigerant undercharge, or a failing start capacitor. If the switch opens, it is performing its primary function of protecting the motor windings.
Can I use this switch as a universal replacement for other brands?
While the electrical specs might appear similar, this is a dedicated Lennox OEM part. For proper fitment and to ensure the trip/reset points match your system's design parameters, this switch should only be used on compatible Lennox and Allied equipment.
Are the leads long enough for rooftop units?
Yes, the 71-inch (nearly 6 feet) lead length is specifically designed to accommodate the larger footprints of commercial package units and split systems where the controller and compressor are positioned further apart.
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 75W43 is a high-precision compressor thermal switch engineered for critical temperature regulation in industrial and residential HVACR systems. As a genuine OEM component (Manufacturer Number 103048-01), this HVAC thermal protection switch prevents catastrophic equipment failure by monitoring operational heat levels. It features a specified open temperature range of 239°F to 257°F, which interrupts the electrical circuit to protect the compressor from overheating. Once the system cools to the close temperature range of 151°F to 187°F, the switch resets to restore normal operation. Built with 71-inch leads, this switch offers versatile installation for various Lennox replacement parts applications, including LGH180U4, LGM180U4, and LCH240H4 units. By using this rugged, factory-spec limit control switch, technicians ensure optimal system efficiency and maintain the original performance ratings of the cooling equipment without the risks associated with universal after-market alternatives.
Key Benefits- Precise Overheat Protection: Triggers circuit interruption at 239°F-257°F to safeguard the compressor from thermal damage.
- Automatic Reset Logic: Resets between 151°F-187°F to ensure system uptime once safe operating conditions are met.
- Extended Installation Reach: Includes 71-inch leads for flexible routing and secure connection in complex cabinet layouts.
- OEM Compatibility: Specifically designed for Lennox and Allied models to maintain factory-grade reliability and airflow efficiency.
- Industrial-Grade Durability: Constructed to withstand high-cycle environments in furnaces and heat pump systems.
What causes the Lennox 75W43 thermal switch to trip frequently?
Frequent tripping usually indicates an overheating compressor, often caused by restricted airflow, refrigerant undercharge, or a failing start capacitor. If the switch opens, it is performing its primary function of protecting the motor windings.
Can I use this switch as a universal replacement for other brands?
While the electrical specs might appear similar, this is a dedicated Lennox OEM part. For proper fitment and to ensure the trip/reset points match your system's design parameters, this switch should only be used on compatible Lennox and Allied equipment.
Are the leads long enough for rooftop units?
Yes, the 71-inch (nearly 6 feet) lead length is specifically designed to accommodate the larger footprints of commercial package units and split systems where the controller and compressor are positioned further apart.
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.
