Lennox 13W13 Blower Relay

The Lennox 13W13 Blower Relay is a genuine OEM 24V furnace fan control relay designed for precise blower motor activation in residential and light commercial HVAC systems. This HVAC blower relay replacement serves as the critical switching interface between the low-voltage thermostat circuit and the high-voltage blower motor, ensuring the fan cycles correctly during heating and cooling demands. Engineered to exact factory specifications, the Lennox 13W13 provides reliable contact closure to eliminate issues such as intermittent fan operation, blowers that fail to turn on, or motors that run continuously due to stuck contacts. As a direct replacement for 13W1301 and R76733900, this component ensures seamless electrical compatibility and mounting alignment within the control cabinet, maintaining the intended sequence of operation for your air handler or furnace.

Key Benefits for Technicians

• Direct OEM Fit: Drop-in replacement for Lennox part numbers 13W13, 13W1301, and R76733900, reducing field modification time.
• Broad Compatibility: Standardized 24V fan control coil voltage simplifies troubleshooting across various Lennox air handlers and gas furnaces.
• Reliable Switching: Heavy-duty internal contacts prevent premature pitting and arching, common causes of furnace blower motor failure.
• Restore Airflow Control: Resolves common HVAC fan relay issues where the blower stays on or fails to trigger during a call for heat or cool.

Common Questions

Is the Lennox 13W13 compatible with other brands?
While this is a Lennox OEM 24V relay, compatibility is specific to systems requiring the 13W13 or its cross-referenced part numbers. Technicians should verify the wiring schematic and coil voltage before installation.

What are the symptoms of a failing blower relay?
Common signs include the indoor fan not starting when the thermostat calls for air, the fan running 24/7 even in the "Auto" position, or a humming sound coming from the control board area without motor engagement.

Does this relay replace the 13W1301?
Yes, the 13W13 is the current factory-authorized replacement for the discontinued or superseded part number 13W1301.

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.