Lennox 22W25 Relay Board Kit

The Lennox 22W25 Relay Board Kit is a critical OEM replacement component designed to provide precise 24V AC switching logic for residential and commercial HVAC units. This kit, which is a direct and identical replacement for the Lennox 22W2501 and the LB-112642A assembly, serves as a high-reliability interface for managing blower delays and component sequencing. By utilizing an integrated blower delay relay, the board ensures the heat exchanger reaches a stable discharge temperature—typically requiring a 45-second ignition delay—to prevent cold air drafts during the initial heating cycle. Similarly, it maintains airflow for approximately 150 seconds post-cycle to dissipate residual heat, enhancing overall HVAC system efficiency. For technicians working on ECB24 series or GCS/GHP units, this Lennox control board facilitates a clean professional install with a compact footprint and standard terminal spacing. Integrating this 24V relay kit optimizes HVAC part compatibility, ensuring that current is accurately routed to fans and contactors based on low-voltage thermostat signals.

• OEM Compatibility: Perfectly replaces legacy Lennox 22W2501 and LB-112642A relay boards without field modification.
• Durable Switching: Rated for 25 Amp service, providing robust HVAC control board performance under high-demand cycling.
• Optimized Airflow: Automated timing sequences improve indoor air quality and protect the motor from short-cycling.
• Technical Precision: Designed for seamless integration with 24V AC circuits, ensuring reliable communication between the thermostat and blower contactor.

Is the 22W25 compatible with older 22W2501 units?
Yes, the 22W25 is technically identical to the 22W2501 and serves as a direct drop-in replacement for that specific Lennox SKU.

How does this board improve system performance?
By managing the blower delay, it prevents the delivery of cool air during startup and ensures all heat is scavenged from the coils after the burner shuts down.

Can this relay board be used in commercial applications?
Yes, this kit is frequently utilized in both residential air handlers and commercial rooftop units that require specific relay-driven blower timing.

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.