Lennox 58C97 Relay

The Lennox 58C97 Relay is a high-performance SPST Heat Sequencer Relay designed specifically for managing timed electrical sequences in residential and commercial HVAC systems. Operating on a 24V AC coil, this thermal delay relay provides critical staging for heating elements, blowers, and auxiliary components to prevent high-current surges and ensure equipment protection. With a precise ON delay of 1 to 60 seconds and an OFF delay of 1 to 45 seconds, the Lennox 58C97 (also referred to as 58C9701) maintains consistent system cycles across Lennox, Armstrong, and Ducane units. This Normally Open (N.O.) stacked relay is a direct OEM replacement engineered to match original factory specifications for 120V to 240V circuits. For technicians troubleshooting intermittent blower issues or faulty heating sequences, installing this genuine HVAC sequencer relay ensures the control board communicates accurately with the air handler, restoring peak operational efficiency without the mechanical noise or timing drift often seen in aftermarket equivalents.

• Precise Timing Control: Features a factory-calibrated thermal delay (1-60s ON / 1-45s OFF) for smooth staging of electric furnace heating elements.
• OEM Compatibility: Exact drop-in replacement for Lennox 58C97 and 58C9701, reducing installation time in tight control panels.
• Universal 24V Logic: Compatible with most standard 24V control circuits typically found in Lennox-brand air handlers and furnaces.
• Enhanced System Protection: Prevents simultaneous high-amperage draws to protect integrated circuit boards and upstream breakers.
• Robust Contact Design: Single Pole Single Throw (SPST) configuration optimized for 120-240V high-voltage heating loads.

Is the 58C97 cross-compatible with other Lennox part numbers?
Yes, this SPST Heat Sequencer Relay is the direct replacement for part number 58C9701 and is commonly used across Lennox, Armstrong, and Ducane platforms.

What are the symptoms of a failing sequencer relay?
Typical failure signs include the blower fan running constantly after the heat cycle ends, heating elements not energizing in the correct sequence, or the 3-amp control fuse repeatedly blowing due to a shorted internal coil.

Can I use this relay for both 120V and 240V applications?
While the coil operates on 24V, the heavy-duty SPST contacts are designed to switch higher voltage circuits, usually ranging from 120V to 240V, depending on your specific furnace wiring diagram.

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.