Lennox 76F73 Relay

The Lennox 76F73 Relay is a heavy-duty, stacked DPST Heat Sequential Relay designed for precise load management in residential and commercial electric furnaces. As a high-performance HVAC sequencer replacement, this 240V component ensures the staggered activation of heating elements, preventing excessive inrush current that can trip breakers or damage sensitive control boards. Operating as a normally open relay, the 76F73 is engineered for high-cycle reliability in demanding thermal environments.

For field technicians performing furnace sequencer troubleshooting, the Lennox 76F73 serves as the direct OEM 24A34-37 replacement. This stacked configuration provides a drop-in fit for Lennox ECB series air handlers and electric heat sections, including popular models like the ECB18 and E10Q. Utilizing this electric furnace heat relay restores original equipment sub-sequence timings, maintaining system efficiency and protecting the blower motor from premature wear during the heat-up and cool-down cycles.

• Direct OEM Compatibility: Seamlessly replaces the 24A34-37 without requiring bracket modifications or wiring re-engineering.
• Enhanced Thermal Management: Precise DPST (Double Pole Single Throw) switching ensures heating elements energize and de-energize in the correct order.
• Industrial Grade Construction: Built to withstand the constant cycling typical of 240V electric heat applications.
• System Protection: Reduces the electrical load spike on the building’s power supply by sequencing high-amperage heating stages.

• Is the 76F73 compatible with 120V systems? No, this specific relay is rated for 240V applications; always verify your coil voltage before installation.
• Can this be used to sequence fan operation? Yes, the 76F73 manages both heating elements and the blower motor to ensure airflow is present before the elements reach high temperatures.
• What does a "stacked" relay mean for installation? The stacked design allows for multiple circuits to be controlled in a compact footprint, making it ideal for multi-stage electric furnaces.

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.