Lennox 49M50 Pressure Switch
The Lennox 49M50 is a high-performance HVAC high pressure switch designed for critical system monitoring in residential and commercial cooling applications. This genuine OEM Lennox pressure switch functions as a primary safety control, specifically calibrated for a 640 psig cut-out (C/O) threshold. When refrigerant pressures exceed this safety limit, the switch breaks the electrical circuit to the compressor, preventing catastrophic component failure and ensuring the refrigerant pressure safety of the entire system. Built for a 24V control circuit, it features a rugged, compact housing for reliable performance in demanding environments.
As a veteran-grade HVAC replacement part, the 49M50 pressure switch is frequently utilized in Lennox-branded condensing units and heat pumps. Its manual reset design requires a technician to physically inspect the system after a high-pressure trip, providing an essential diagnostic checkpoint to identify underlying issues like blocked condenser coils or fan motor failures. For contractors, this pressure-activated switch offers a drop-in solution to maintain factory specifications and ensure long-term system integrity.
Key Benefits
- Precision Calibration: Factory-set 640 psig cut-out provides consistent protection against over-pressurization in high-pressure refrigerant cycles.
- OEM Reliability: Genuine Lennox 49M50 construction ensures exact electrical and mechanical compatibility with original equipment.
- Manual Safety Reset: Forces a manual system check following a high-pressure event, ensuring root causes are addressed before operation resumes.
- Durable Infrastructure: Engineered with corrosion-resistant materials to withstand vibration and professional use in outdoor condensers.
Common Questions
What causes a 640 psig cut-out to trip on this switch?
Common triggers include a dirty condenser coil, a failed outdoor fan motor, or an overcharge of refrigerant, all of which cause head pressure to exceed the 640 psig safety limit.
Is the Lennox 49M50 an automatic or manual reset switch?
The 49M50 is a manual reset high pressure switch, meaning once it trips at 640 psig, it must be manually repressed after the pressure drops to a safe level to close the circuit.
Can this part be used in R-410A systems?
Yes, the 640 psig threshold is specifically designed for the higher operating pressures typically associated with R-410A refrigerant systems.
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: $28.58
-65%$28.58
$10.00Lennox 49M50 Pressure Switch
The Lennox 49M50 is a high-performance HVAC high pressure switch designed for critical system monitoring in residential and commercial cooling applications. This genuine OEM Lennox pressure switch functions as a primary safety control, specifically calibrated for a 640 psig cut-out (C/O) threshold. When refrigerant pressures exceed this safety limit, the switch breaks the electrical circuit to the compressor, preventing catastrophic component failure and ensuring the refrigerant pressure safety of the entire system. Built for a 24V control circuit, it features a rugged, compact housing for reliable performance in demanding environments.
As a veteran-grade HVAC replacement part, the 49M50 pressure switch is frequently utilized in Lennox-branded condensing units and heat pumps. Its manual reset design requires a technician to physically inspect the system after a high-pressure trip, providing an essential diagnostic checkpoint to identify underlying issues like blocked condenser coils or fan motor failures. For contractors, this pressure-activated switch offers a drop-in solution to maintain factory specifications and ensure long-term system integrity.
Key Benefits
- Precision Calibration: Factory-set 640 psig cut-out provides consistent protection against over-pressurization in high-pressure refrigerant cycles.
- OEM Reliability: Genuine Lennox 49M50 construction ensures exact electrical and mechanical compatibility with original equipment.
- Manual Safety Reset: Forces a manual system check following a high-pressure event, ensuring root causes are addressed before operation resumes.
- Durable Infrastructure: Engineered with corrosion-resistant materials to withstand vibration and professional use in outdoor condensers.
Common Questions
What causes a 640 psig cut-out to trip on this switch?
Common triggers include a dirty condenser coil, a failed outdoor fan motor, or an overcharge of refrigerant, all of which cause head pressure to exceed the 640 psig safety limit.
Is the Lennox 49M50 an automatic or manual reset switch?
The 49M50 is a manual reset high pressure switch, meaning once it trips at 640 psig, it must be manually repressed after the pressure drops to a safe level to close the circuit.
Can this part be used in R-410A systems?
Yes, the 640 psig threshold is specifically designed for the higher operating pressures typically associated with R-410A refrigerant systems.
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
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Description
The Lennox 49M50 is a high-performance HVAC high pressure switch designed for critical system monitoring in residential and commercial cooling applications. This genuine OEM Lennox pressure switch functions as a primary safety control, specifically calibrated for a 640 psig cut-out (C/O) threshold. When refrigerant pressures exceed this safety limit, the switch breaks the electrical circuit to the compressor, preventing catastrophic component failure and ensuring the refrigerant pressure safety of the entire system. Built for a 24V control circuit, it features a rugged, compact housing for reliable performance in demanding environments.
As a veteran-grade HVAC replacement part, the 49M50 pressure switch is frequently utilized in Lennox-branded condensing units and heat pumps. Its manual reset design requires a technician to physically inspect the system after a high-pressure trip, providing an essential diagnostic checkpoint to identify underlying issues like blocked condenser coils or fan motor failures. For contractors, this pressure-activated switch offers a drop-in solution to maintain factory specifications and ensure long-term system integrity.
Key Benefits
- Precision Calibration: Factory-set 640 psig cut-out provides consistent protection against over-pressurization in high-pressure refrigerant cycles.
- OEM Reliability: Genuine Lennox 49M50 construction ensures exact electrical and mechanical compatibility with original equipment.
- Manual Safety Reset: Forces a manual system check following a high-pressure event, ensuring root causes are addressed before operation resumes.
- Durable Infrastructure: Engineered with corrosion-resistant materials to withstand vibration and professional use in outdoor condensers.
Common Questions
What causes a 640 psig cut-out to trip on this switch?
Common triggers include a dirty condenser coil, a failed outdoor fan motor, or an overcharge of refrigerant, all of which cause head pressure to exceed the 640 psig safety limit.
Is the Lennox 49M50 an automatic or manual reset switch?
The 49M50 is a manual reset high pressure switch, meaning once it trips at 640 psig, it must be manually repressed after the pressure drops to a safe level to close the circuit.
Can this part be used in R-410A systems?
Yes, the 640 psig threshold is specifically designed for the higher operating pressures typically associated with R-410A refrigerant systems.
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.
