Lennox 36W90 Limit Switch
The Lennox 36W90 Limit Switch is a critical safety component designed for precise thermal regulation within various residential and commercial HVAC systems, including high-efficiency furnaces and air handlers. This 160-190F AUTO limit switch functions as a Normally Closed (NC) safety device that opens the electrical circuit when the internal plenum temperature reaches the 190 degree high-limit setpoint, effectively cutting power to the heating element to prevent equipment overheating. Once the system cools to the 160 degree reset temperature, the switch automatically closes to restore normal operation. Engineered as a genuine Lennox OEM replacement part (Cat# 36W90, Model R46105-007), this STILT-type control features a 3.18-inch Overall Length (OAL) and a 3-inch element length. It is a direct fit for numerous Lennox furnace models, such as the 12GCS, CG80, and G61 series, ensuring seamless integration and factory-spec performance. For contractors performing a Lennox limit switch replacement, this component provides the high-tolerance sensing required to maintain system integrity and prevent premature heat exchanger failure.
Key Benefits- Factory-Calibrated Precision: Features a fixed 160°F reset and 190°F trip point for consistent furnace high-limit protection.
- Automatic Reset Functionality: eliminates the need for manual intervention by automatically restoring power once temperatures fall within safe operating parameters.
- OEM Compatibility: Specifically designed to replace Lennox part numbers 36W90, R46105-007, and 10M64, maintaining the original engineering specifications of the unit.
- Industrial-Grade Construction: Built to withstand the high-cycle demands of modern HVAC heat exchangers and air handling units.
- What causes a Lennox 36W90 to trip frequently? Repetitive tripping usually indicates restricted airflow due to a dirty filter, failing blower motor, or blocked ductwork, causing the furnace temperature to exceed the 190°F threshold.
- Can this switch be used in non-Lennox equipment? While technically a 160-190F limit switch, it is optimized for Lennox mounting footprints and terminal orientations. Always verify the STILT depth and temperature range before cross-referencing.
- How do I verify if my limit switch is faulty? A technician should check for continuity across the terminals when the system is cool; if the circuit remains open at room temperature, the limit control switch likely requires replacement.
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: $9.85
-65%$9.85
$3.45Lennox 36W90 Limit Switch
The Lennox 36W90 Limit Switch is a critical safety component designed for precise thermal regulation within various residential and commercial HVAC systems, including high-efficiency furnaces and air handlers. This 160-190F AUTO limit switch functions as a Normally Closed (NC) safety device that opens the electrical circuit when the internal plenum temperature reaches the 190 degree high-limit setpoint, effectively cutting power to the heating element to prevent equipment overheating. Once the system cools to the 160 degree reset temperature, the switch automatically closes to restore normal operation. Engineered as a genuine Lennox OEM replacement part (Cat# 36W90, Model R46105-007), this STILT-type control features a 3.18-inch Overall Length (OAL) and a 3-inch element length. It is a direct fit for numerous Lennox furnace models, such as the 12GCS, CG80, and G61 series, ensuring seamless integration and factory-spec performance. For contractors performing a Lennox limit switch replacement, this component provides the high-tolerance sensing required to maintain system integrity and prevent premature heat exchanger failure.
Key Benefits- Factory-Calibrated Precision: Features a fixed 160°F reset and 190°F trip point for consistent furnace high-limit protection.
- Automatic Reset Functionality: eliminates the need for manual intervention by automatically restoring power once temperatures fall within safe operating parameters.
- OEM Compatibility: Specifically designed to replace Lennox part numbers 36W90, R46105-007, and 10M64, maintaining the original engineering specifications of the unit.
- Industrial-Grade Construction: Built to withstand the high-cycle demands of modern HVAC heat exchangers and air handling units.
- What causes a Lennox 36W90 to trip frequently? Repetitive tripping usually indicates restricted airflow due to a dirty filter, failing blower motor, or blocked ductwork, causing the furnace temperature to exceed the 190°F threshold.
- Can this switch be used in non-Lennox equipment? While technically a 160-190F limit switch, it is optimized for Lennox mounting footprints and terminal orientations. Always verify the STILT depth and temperature range before cross-referencing.
- How do I verify if my limit switch is faulty? A technician should check for continuity across the terminals when the system is cool; if the circuit remains open at room temperature, the limit control switch likely requires replacement.
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 36W90 Limit Switch is a critical safety component designed for precise thermal regulation within various residential and commercial HVAC systems, including high-efficiency furnaces and air handlers. This 160-190F AUTO limit switch functions as a Normally Closed (NC) safety device that opens the electrical circuit when the internal plenum temperature reaches the 190 degree high-limit setpoint, effectively cutting power to the heating element to prevent equipment overheating. Once the system cools to the 160 degree reset temperature, the switch automatically closes to restore normal operation. Engineered as a genuine Lennox OEM replacement part (Cat# 36W90, Model R46105-007), this STILT-type control features a 3.18-inch Overall Length (OAL) and a 3-inch element length. It is a direct fit for numerous Lennox furnace models, such as the 12GCS, CG80, and G61 series, ensuring seamless integration and factory-spec performance. For contractors performing a Lennox limit switch replacement, this component provides the high-tolerance sensing required to maintain system integrity and prevent premature heat exchanger failure.
Key Benefits- Factory-Calibrated Precision: Features a fixed 160°F reset and 190°F trip point for consistent furnace high-limit protection.
- Automatic Reset Functionality: eliminates the need for manual intervention by automatically restoring power once temperatures fall within safe operating parameters.
- OEM Compatibility: Specifically designed to replace Lennox part numbers 36W90, R46105-007, and 10M64, maintaining the original engineering specifications of the unit.
- Industrial-Grade Construction: Built to withstand the high-cycle demands of modern HVAC heat exchangers and air handling units.
- What causes a Lennox 36W90 to trip frequently? Repetitive tripping usually indicates restricted airflow due to a dirty filter, failing blower motor, or blocked ductwork, causing the furnace temperature to exceed the 190°F threshold.
- Can this switch be used in non-Lennox equipment? While technically a 160-190F limit switch, it is optimized for Lennox mounting footprints and terminal orientations. Always verify the STILT depth and temperature range before cross-referencing.
- How do I verify if my limit switch is faulty? A technician should check for continuity across the terminals when the system is cool; if the circuit remains open at room temperature, the limit control switch likely requires replacement.
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.
