Lennox 46F12 Relay

The Lennox 46F12 Relay is a specialized SPST 24V relay designed for sequence control and delay purge cycles in residential and commercial HVAC units. This component, which is identical to 46F1201, acts as a primary control interface—typically managing blower motor timing or burner ignition sequences to ensure safe combustion gas evacuation. Built for 24-volt control circuits, the 46F12 provides precise timing intervals (on 25-55 sec / off 14-45 sec) required for high-efficiency system operation. For technicians performing field service, this Lennox OEM relay is the direct replacement for older 46F1201PR kits, providing a drop-in HVAC relay replacement without the need for mounting modifications. If you are troubleshooting a unit that fails to initiate the purge cycle or has a stuck blower circuit, this time delay relay is the standard solution for restoring proper sequence logic and voltage isolation across the control board.

• Universal Compatibility: Fully interchangeable and identical to 46F1201 and 46F1201PR models.
• Precise Timing: Factory-calibrated for delay purge functionality to ensure safe and efficient system startups.
• Direct OEM Fit: Standard SPST configuration ensures seamless integration with 24V Lennox control systems.
• Enhanced Reliability: Engineered for industrial-grade switching to handle repeated cycles without contact pitting.

Is the 46F12 compatible with the 46F1201?
Yes, the Lennox 46F12 is the exact functional equivalent and replacement for the 46F1201 and the 46F1201PR kit.

What is the primary function of a delay purge relay?
In HVACR applications, these relays ensure the blower or fan runs for a specific interval to purge any residual gases or heat before or after the burner cycle.

Can this relay be used in non-Lennox systems?
While it is an OEM Lennox part, it can function in any 24V circuit requiring an SPST connection with these specific timing parameters, though mounting orientation should be verified.

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.