Lennox 56L68 Relay

The Lennox 56L68 is a heavy-duty K20 blower relay engineered for precise airflow management in residential and commercial HVAC systems. This 24V SPDT relay (Single Pole Double Throw) provides reliable switching for blower motors, allowing a low-voltage control signal to efficiently manage high-power line circuits. It is functionally identical to the Lennox 56L6801 and serves as a direct OEM replacement part for aging or sticking furnace relays in various Lennox-brand air handlers and furnaces.

Designed for professional-grade reliability, the 56L68 features a rugged "ice cube" style construction that handles high-cycle demands without premature contact pitting. This HVAC blower motor relay is rated for multiple voltage applications, including 15A at 277VAC and up to 3HP at 600VAC, making it a versatile component for your truck stock. Whether you are dealing with a blower that won’t engage or one that runs constantly due to welded contacts, this 24VAC control relay ensures the system returns to its original sequence of operation.

• Broad Compatibility: Direct replacement for the Lennox 56L6801, 69J56, and 69J5601 across Lennox, Allied, and Ducane equipment.
• Industrial-Grade Contacts: SPDT configuration supports both normally open and normally closed circuits for versatile fan control.
• Compact Footprint: Standard plug-in design allows for fast installation in tight control cabinets and motor compartments.
• Multi-Rating Performance: Reliable switching for motors up to 15 Amps, ensuring long-term durability under heavy inductive loads.

Will this work if my fan only runs in 'On' mode but not 'Auto'?
Yes. If the thermostat signal is present at the G terminal but the blower fails to engage in the automatic cycle, a failed 24V relay coil or open contacts in the 56L68 are common culprits.

Is the 56L6801 high-speed compatible?
This relay is frequently used to manage high-speed cooling taps or heat speed transitions, depending on the specific furnace wiring and board logic.

Can I use this relay to replace a 3PDT model?
No. The 56L68 is a Single Pole Double Throw (SPDT) relay. Always verify the pole configuration of the existing part before installation to ensure proper circuit isolation.

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.