Lennox 79J11 Freezestat
The Lennox 79J11 Freezestat (OEM Part # 79J1101) is a precision-engineered low-temperature cutout switch designed to protect evaporator coils and heat exchangers from debilitating freeze-up conditions. As a normally closed (NC) safety device, this single-pole snap-action thermostat monitors refrigerant and air temperatures within Lennox packaged units and air handlers. It is calibrated to trigger an open circuit at 29°F to interrupt the compressor or fan circuit, preventing ice accumulation that can lead to ruptured coils or compressor slugging. Once the sensed temperature rises to the reset threshold of 50°F, the switch closes to allow the system to resume standard operation.
Built for the rigors of commercial HVAC maintenance, the Lennox 79J11 features a durable sensing element and a reliable 12.5-inch lead for streamlined integration into existing safety loops. This OEM HVAC replacement part ensures exact electrical ratings and mounting compatibility for veteran technicians servicing Lennox LGA, LGC, and typical rooftop unit (RTU) configurations. By maintaining a strict 29F open / 50F close differential, this component provides essential protection for refrigeration systems and perishable inventory in industrial or high-demand environments.
Key Benefits:- Precise Coil Protection: Calibrated specifically to open at 29°F, preventing catastrophic ice buildup on evaporator coils.
- Automatic Reset: Self-correcting logic closes the circuit at 50°F, reducing unnecessary service calls for manual system restarts after transient temperature drops.
- OEM Compatibility: Genuine Lennox replacement part ensures seamless fit and electrical performance in Lennox packaged systems.
- Critical Safety Redundancy: Acts as a primary defense against low-airflow conditions and TXV malfunctions that cause sub-freezing temperatures.
- Where is the 79J11 freezestat typically installed? It is generally mounted on the suction line or the leaving side of the evaporator coil to monitor the coldest part of the circuit.
- Can this part be used in other HVAC brands? While designed for Lennox equipment, it functions as a universal 29/50 NC switch; however, verifying the mounting footprint and terminal type is recommended for non-Lennox units.
- Does this require a manual reset? No, the 79J11 is an automatic reset switch that closes once the temperature reaches 50°F.
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: $36.73
-65%$36.73
$12.86Lennox 79J11 Freezestat
The Lennox 79J11 Freezestat (OEM Part # 79J1101) is a precision-engineered low-temperature cutout switch designed to protect evaporator coils and heat exchangers from debilitating freeze-up conditions. As a normally closed (NC) safety device, this single-pole snap-action thermostat monitors refrigerant and air temperatures within Lennox packaged units and air handlers. It is calibrated to trigger an open circuit at 29°F to interrupt the compressor or fan circuit, preventing ice accumulation that can lead to ruptured coils or compressor slugging. Once the sensed temperature rises to the reset threshold of 50°F, the switch closes to allow the system to resume standard operation.
Built for the rigors of commercial HVAC maintenance, the Lennox 79J11 features a durable sensing element and a reliable 12.5-inch lead for streamlined integration into existing safety loops. This OEM HVAC replacement part ensures exact electrical ratings and mounting compatibility for veteran technicians servicing Lennox LGA, LGC, and typical rooftop unit (RTU) configurations. By maintaining a strict 29F open / 50F close differential, this component provides essential protection for refrigeration systems and perishable inventory in industrial or high-demand environments.
Key Benefits:- Precise Coil Protection: Calibrated specifically to open at 29°F, preventing catastrophic ice buildup on evaporator coils.
- Automatic Reset: Self-correcting logic closes the circuit at 50°F, reducing unnecessary service calls for manual system restarts after transient temperature drops.
- OEM Compatibility: Genuine Lennox replacement part ensures seamless fit and electrical performance in Lennox packaged systems.
- Critical Safety Redundancy: Acts as a primary defense against low-airflow conditions and TXV malfunctions that cause sub-freezing temperatures.
- Where is the 79J11 freezestat typically installed? It is generally mounted on the suction line or the leaving side of the evaporator coil to monitor the coldest part of the circuit.
- Can this part be used in other HVAC brands? While designed for Lennox equipment, it functions as a universal 29/50 NC switch; however, verifying the mounting footprint and terminal type is recommended for non-Lennox units.
- Does this require a manual reset? No, the 79J11 is an automatic reset switch that closes once the temperature reaches 50°F.
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 79J11 Freezestat (OEM Part # 79J1101) is a precision-engineered low-temperature cutout switch designed to protect evaporator coils and heat exchangers from debilitating freeze-up conditions. As a normally closed (NC) safety device, this single-pole snap-action thermostat monitors refrigerant and air temperatures within Lennox packaged units and air handlers. It is calibrated to trigger an open circuit at 29°F to interrupt the compressor or fan circuit, preventing ice accumulation that can lead to ruptured coils or compressor slugging. Once the sensed temperature rises to the reset threshold of 50°F, the switch closes to allow the system to resume standard operation.
Built for the rigors of commercial HVAC maintenance, the Lennox 79J11 features a durable sensing element and a reliable 12.5-inch lead for streamlined integration into existing safety loops. This OEM HVAC replacement part ensures exact electrical ratings and mounting compatibility for veteran technicians servicing Lennox LGA, LGC, and typical rooftop unit (RTU) configurations. By maintaining a strict 29F open / 50F close differential, this component provides essential protection for refrigeration systems and perishable inventory in industrial or high-demand environments.
Key Benefits:- Precise Coil Protection: Calibrated specifically to open at 29°F, preventing catastrophic ice buildup on evaporator coils.
- Automatic Reset: Self-correcting logic closes the circuit at 50°F, reducing unnecessary service calls for manual system restarts after transient temperature drops.
- OEM Compatibility: Genuine Lennox replacement part ensures seamless fit and electrical performance in Lennox packaged systems.
- Critical Safety Redundancy: Acts as a primary defense against low-airflow conditions and TXV malfunctions that cause sub-freezing temperatures.
- Where is the 79J11 freezestat typically installed? It is generally mounted on the suction line or the leaving side of the evaporator coil to monitor the coldest part of the circuit.
- Can this part be used in other HVAC brands? While designed for Lennox equipment, it functions as a universal 29/50 NC switch; however, verifying the mounting footprint and terminal type is recommended for non-Lennox units.
- Does this require a manual reset? No, the 79J11 is an automatic reset switch that closes once the temperature reaches 50°F.
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.
