Lennox 42W18 Coil
The Lennox 42W18 is a heavy-duty 24V solenoid coil designed specifically for the activation of reversing valves in heat pump systems. Engineered to meet precise OEM specifications, this coil generates the electromagnetic field necessary to shift the internal slide of the reversing valve, allowing the system to toggle between heating and cooling modes. This HVAC solenoid replacement is a common solution for technicians troubleshooting thermal regulation issues where the heat pump is stuck in one cycle or failing to energize the pilot valve.
Constructed for longevity in demanding environments, the 42W18 Lennox coil features a 24 VAC 50/60 Hz rating and serves as a direct replacement for legacy part numbers 75M49 and 28W48. At a gross weight of approximately 0.32 lbs, it offers a compact profile that facilitates straightforward installation in tight control compartments. Maintaining a functional reversing valve coil is critical for preventing compressor strain and ensuring efficient refrigerant flow throughout the system's manifold.
Key Benefits
- Direct OEM Match: Ensures exact fitment and electrical compatibility with Lennox heat pump reversing valves.
- High-Efficiency Magnetics: Provides reliable pulling force to actuate valve internals under standard 24V HVAC control signals.
- Broad Compatibility: Replaces older 75M49 and 28W48 models, streamlining truck stock for service contractors.
- Durable Encapsulation: Built to withstand the humidity and temperature fluctuations common in condensing units.
Common Questions
How do I test if a 42W18 solenoid coil is bad?
Use a multimeter to check for continuity or measure the resistance (ohms) across the coil leads. If the circuit is open or has infinite resistance, the internal windings have failed and the coil requires replacement.
Will this coil work with other brands of reversing valves?
The Lennox 42W18 is specifically designed for Lennox and allied brand equipment. Always verify your specific reversing valve model to ensure the coil sleeve diameter and height match the valve stem.
What causes a solenoid coil to burn out?
Common culprits include voltage spikes, low voltage causing excessive current draw, or mechanical binding within the reversing valve itself that prevents the plunger from seating, leading to overheating.
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.
Lennox 42W18 Coil
The Lennox 42W18 is a heavy-duty 24V solenoid coil designed specifically for the activation of reversing valves in heat pump systems. Engineered to meet precise OEM specifications, this coil generates the electromagnetic field necessary to shift the internal slide of the reversing valve, allowing the system to toggle between heating and cooling modes. This HVAC solenoid replacement is a common solution for technicians troubleshooting thermal regulation issues where the heat pump is stuck in one cycle or failing to energize the pilot valve.
Constructed for longevity in demanding environments, the 42W18 Lennox coil features a 24 VAC 50/60 Hz rating and serves as a direct replacement for legacy part numbers 75M49 and 28W48. At a gross weight of approximately 0.32 lbs, it offers a compact profile that facilitates straightforward installation in tight control compartments. Maintaining a functional reversing valve coil is critical for preventing compressor strain and ensuring efficient refrigerant flow throughout the system's manifold.
Key Benefits
- Direct OEM Match: Ensures exact fitment and electrical compatibility with Lennox heat pump reversing valves.
- High-Efficiency Magnetics: Provides reliable pulling force to actuate valve internals under standard 24V HVAC control signals.
- Broad Compatibility: Replaces older 75M49 and 28W48 models, streamlining truck stock for service contractors.
- Durable Encapsulation: Built to withstand the humidity and temperature fluctuations common in condensing units.
Common Questions
How do I test if a 42W18 solenoid coil is bad?
Use a multimeter to check for continuity or measure the resistance (ohms) across the coil leads. If the circuit is open or has infinite resistance, the internal windings have failed and the coil requires replacement.
Will this coil work with other brands of reversing valves?
The Lennox 42W18 is specifically designed for Lennox and allied brand equipment. Always verify your specific reversing valve model to ensure the coil sleeve diameter and height match the valve stem.
What causes a solenoid coil to burn out?
Common culprits include voltage spikes, low voltage causing excessive current draw, or mechanical binding within the reversing valve itself that prevents the plunger from seating, leading to overheating.
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.
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
The Lennox 42W18 is a heavy-duty 24V solenoid coil designed specifically for the activation of reversing valves in heat pump systems. Engineered to meet precise OEM specifications, this coil generates the electromagnetic field necessary to shift the internal slide of the reversing valve, allowing the system to toggle between heating and cooling modes. This HVAC solenoid replacement is a common solution for technicians troubleshooting thermal regulation issues where the heat pump is stuck in one cycle or failing to energize the pilot valve.
Constructed for longevity in demanding environments, the 42W18 Lennox coil features a 24 VAC 50/60 Hz rating and serves as a direct replacement for legacy part numbers 75M49 and 28W48. At a gross weight of approximately 0.32 lbs, it offers a compact profile that facilitates straightforward installation in tight control compartments. Maintaining a functional reversing valve coil is critical for preventing compressor strain and ensuring efficient refrigerant flow throughout the system's manifold.
Key Benefits
- Direct OEM Match: Ensures exact fitment and electrical compatibility with Lennox heat pump reversing valves.
- High-Efficiency Magnetics: Provides reliable pulling force to actuate valve internals under standard 24V HVAC control signals.
- Broad Compatibility: Replaces older 75M49 and 28W48 models, streamlining truck stock for service contractors.
- Durable Encapsulation: Built to withstand the humidity and temperature fluctuations common in condensing units.
Common Questions
How do I test if a 42W18 solenoid coil is bad?
Use a multimeter to check for continuity or measure the resistance (ohms) across the coil leads. If the circuit is open or has infinite resistance, the internal windings have failed and the coil requires replacement.
Will this coil work with other brands of reversing valves?
The Lennox 42W18 is specifically designed for Lennox and allied brand equipment. Always verify your specific reversing valve model to ensure the coil sleeve diameter and height match the valve stem.
What causes a solenoid coil to burn out?
Common culprits include voltage spikes, low voltage causing excessive current draw, or mechanical binding within the reversing valve itself that prevents the plunger from seating, leading to overheating.
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.
