Lennox 28W59 Control Box

The Lennox 28W59 Control Box (LB-108340) is an essential OEM replacement part engineered to house and protect the delicate electrical architecture of select Lennox furnaces and air handlers. For technicians dealing with corroded enclosures or a compromised HVAC control module, this factory-spec metal housing provides the necessary environmental shielding and precise mounting points for internal circuit boards. Maintaining the integrity of the Lennox furnace control box is critical for preventing vibration-induced wiring failures and ensuring the internal HVAC electrical components operate within their designed thermal parameters.

This genuine Lennox part is built from high-grade materials to withstand the high-temperature environments of residential and light commercial equipment. By utilizing this specific LB-108340 control box, contractors can ensure a direct-fit installation without the need for field modifications, preserving the UL listing and safety certifications of the original equipment. It simplifies cable management and provides a stable, grounded platform for the primary ignition control or integrated furnace board, facilitating faster troubleshooting and long-term HVAC system reliability.

Key Benefits for Contractors:

• Precise OEM Fit: Eliminates the need for field drilling or mounting bracket modifications, saving time during emergency service calls.
• Enhanced Component Protection: The heavy-duty metal enclosure shields sensitive HVAC controls from dust, moisture, and mechanical damage.
• Optimal Thermal Management: Designed for proper airflow around internal boards, preventing premature failure due to heat soak.
• System Integrity: Direct replacement for Lennox 28W59 ensures consistent grounding and electrical isolation according to factory diagrams.

Common Questions:

Is the Lennox 28W59 a universal control box?
No, the 28W59 is a specific Lennox OEM part designed for compatibility with select furnace and air handler models. Always verify against your unit's serial and model number to ensure proper fit.

What causes a control box to need replacement?
Technicians often replace the LB-108340 due to terminal strip corrosion, physical damage from cabinet vibration, or degradation of the mounting legs that secure internal control boards.

Does this enclosure include the internal circuit board?
The 28W59 is the control box enclosure. Internal components such as ignition controls or transformers must be ordered separately if they are not being transferred from the existing unit.

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.