Lennox 10P18 Transformer

The Lennox 10P18 is an OEM-grade 120-24V Multi MT 40VA Transformer designed for high-reliability voltage step-down in residential and commercial HVACR systems. As a veteran technician knows, maintaining a stable 24VAC control circuit is critical for the longevity of contactors, thermostats, and integrated furnace Peck boards. This specific HVAC 24 volt transformer features a 120V primary input and a 24V secondary output, providing a robust 40VA power rating to handle modern multi-stage equipment. The 10P18 is the direct manufacturer replacement and is identical to 10P1801, ensuring a seamless drop-in fit without the need for field modifications or bracket fabrication. Its multi-mount configuration—including foot, plate, and conduit knockout options—allows for versatile installation in tight electrical cabinets or external junction boxes. Built as a Class 2 power source, it meets all standard safety protocols for HVAC troubleshooting and system upgrades, providing the consistent current needed for reliable furnace maintenance and 24/7 cooling operations.

• Direct OEM Replacement: Fully compatible with systems requiring the Lennox 10P18 or 10P1801, eliminating compatibility guesswork.
• Universal Mounting: Features a multi-tap design with foot, plate, and conduit mounting capabilities for maximum field flexibility.
• High Power Capacity: 40VA rating provides ample overhead for complex control circuits and connected smart accessories.
• Class 2 Certified: Engineered for safe, low-voltage power distribution across all standard heating and cooling services.

Is the 10P18 compatible with the 10P1801?
Yes, these parts are technically identical and can be used interchangeably in any Lennox application requiring a 120V to 24V step-down.

Can this transformer be mounted on a 4x4 junction box?
The multi-mount design including plate and conduit knockout options allows for easy integration with standard electrical boxes and HVAC ductwork controls.

What is the primary application for this 40VA transformer?
It is primarily used to provide control voltage for thermostats, ignition modules, and solenoids during air conditioning repair or furnace service.

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.