Lennox 78M23 Thermostat
The Lennox 78M23 Discharge Thermostat is a critical safety component designed for precise compressor protection in high-performance residential and commercial HVAC units. As a high-limit security switch, this Lennox OEM replacement part monitors the discharge line temperature, ensuring that hot refrigerant vapor exiting the compressor does not exceed safe operating thresholds. When the line reaches a critical temperature—typically associated with high-head pressure or loss of charge—the Lennox 78M23 breaks the control circuit to prevent catastrophic internal damage and oil breakdown.
Engineered for high-demand environments, this HVAC discharge line sensor features an L250-50F temperature switch configuration, ensuring an automatic reset once the system cools to an acceptable range. Its robust 2-wire thermistor design allows for seamless integration with units manufacturing after 2000, specifically those within the 30,000 to 52,000 BTU capacity range. For technicians performing preventative maintenance or emergency repairs, installing this genuine Lennox part restores factory-spec thermal monitoring and maintains the integrity of the refrigeration cycle.
Key Benefits- Thermal Protection: Prevents compressor failure by cutting power when discharge gases exceed 250°F.
- OEM Precision: Genuine Lennox 78M23 ensures exact fitment and calibration for Lennox and Armstrong equipment.
- Automatic Reset: Resumes normal operation once the line temperature drops by 50°F, reducing unnecessary downtime.
- Durable Construction: Built to withstand constant vibration and high-thermal cycling on the compressor discharge pipe.
What causes the Lennox 78M23 to trip frequently?
Frequent tripping usually indicates an underlying system issue such as a dirty condenser coil, a restricted expansion valve, or a low refrigerant charge causing high discharge temperatures.
Is this thermostat compatible with R-410A systems?
Yes, this discharge line thermostat is designed to handle the higher operating temperatures and pressures associated with R-410A and HFC-based Lennox cooling systems.
Where should the 78M23 be mounted?
It should be securely fastened to the compressor discharge line, typically within the first 6 to 12 inches of the outlet, to ensure accurate sensing of the hottest refrigerant vapor.
This item is not eligible for free shipping.
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: $34.99
-65%$34.99
$12.25Lennox 78M23 Thermostat
The Lennox 78M23 Discharge Thermostat is a critical safety component designed for precise compressor protection in high-performance residential and commercial HVAC units. As a high-limit security switch, this Lennox OEM replacement part monitors the discharge line temperature, ensuring that hot refrigerant vapor exiting the compressor does not exceed safe operating thresholds. When the line reaches a critical temperature—typically associated with high-head pressure or loss of charge—the Lennox 78M23 breaks the control circuit to prevent catastrophic internal damage and oil breakdown.
Engineered for high-demand environments, this HVAC discharge line sensor features an L250-50F temperature switch configuration, ensuring an automatic reset once the system cools to an acceptable range. Its robust 2-wire thermistor design allows for seamless integration with units manufacturing after 2000, specifically those within the 30,000 to 52,000 BTU capacity range. For technicians performing preventative maintenance or emergency repairs, installing this genuine Lennox part restores factory-spec thermal monitoring and maintains the integrity of the refrigeration cycle.
Key Benefits- Thermal Protection: Prevents compressor failure by cutting power when discharge gases exceed 250°F.
- OEM Precision: Genuine Lennox 78M23 ensures exact fitment and calibration for Lennox and Armstrong equipment.
- Automatic Reset: Resumes normal operation once the line temperature drops by 50°F, reducing unnecessary downtime.
- Durable Construction: Built to withstand constant vibration and high-thermal cycling on the compressor discharge pipe.
What causes the Lennox 78M23 to trip frequently?
Frequent tripping usually indicates an underlying system issue such as a dirty condenser coil, a restricted expansion valve, or a low refrigerant charge causing high discharge temperatures.
Is this thermostat compatible with R-410A systems?
Yes, this discharge line thermostat is designed to handle the higher operating temperatures and pressures associated with R-410A and HFC-based Lennox cooling systems.
Where should the 78M23 be mounted?
It should be securely fastened to the compressor discharge line, typically within the first 6 to 12 inches of the outlet, to ensure accurate sensing of the hottest refrigerant vapor.
This item is not eligible for free shipping.
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 78M23 Discharge Thermostat is a critical safety component designed for precise compressor protection in high-performance residential and commercial HVAC units. As a high-limit security switch, this Lennox OEM replacement part monitors the discharge line temperature, ensuring that hot refrigerant vapor exiting the compressor does not exceed safe operating thresholds. When the line reaches a critical temperature—typically associated with high-head pressure or loss of charge—the Lennox 78M23 breaks the control circuit to prevent catastrophic internal damage and oil breakdown.
Engineered for high-demand environments, this HVAC discharge line sensor features an L250-50F temperature switch configuration, ensuring an automatic reset once the system cools to an acceptable range. Its robust 2-wire thermistor design allows for seamless integration with units manufacturing after 2000, specifically those within the 30,000 to 52,000 BTU capacity range. For technicians performing preventative maintenance or emergency repairs, installing this genuine Lennox part restores factory-spec thermal monitoring and maintains the integrity of the refrigeration cycle.
Key Benefits- Thermal Protection: Prevents compressor failure by cutting power when discharge gases exceed 250°F.
- OEM Precision: Genuine Lennox 78M23 ensures exact fitment and calibration for Lennox and Armstrong equipment.
- Automatic Reset: Resumes normal operation once the line temperature drops by 50°F, reducing unnecessary downtime.
- Durable Construction: Built to withstand constant vibration and high-thermal cycling on the compressor discharge pipe.
What causes the Lennox 78M23 to trip frequently?
Frequent tripping usually indicates an underlying system issue such as a dirty condenser coil, a restricted expansion valve, or a low refrigerant charge causing high discharge temperatures.
Is this thermostat compatible with R-410A systems?
Yes, this discharge line thermostat is designed to handle the higher operating temperatures and pressures associated with R-410A and HFC-based Lennox cooling systems.
Where should the 78M23 be mounted?
It should be securely fastened to the compressor discharge line, typically within the first 6 to 12 inches of the outlet, to ensure accurate sensing of the hottest refrigerant vapor.
This item is not eligible for free shipping.
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.
