Lennox 68J37 Contactor

The Lennox 68J37 Contactor is a heavy-duty 2-pole 35-amp electrical contactor engineered for consistent performance in residential and light commercial HVAC systems. This definite purpose contactor features a 24V coil and serves as a direct replacement for Lennox 68J3701 and 3100-20Q2208. Built to withstand the high inrush currents typical of AC compressor startup, its silver cadmium oxide contacts resist welding and pitting under thermal load. The enclosed coil design protects internal components from environmental debris, ensuring reliable HVAC contactor switching across thousands of cycles. When troubleshooting a failed AC contactor or a humming outdoor unit, this component provides the exact electrical specifications required to restore power to the compressor and condenser fan motor. Ensure the Lennox OEM contactor matches your system's FLA (Full Load Amps) and LRA (Locked Rotor Amps) ratings before installation to maintain circuit integrity.

Key Benefits:

• Broad Compatibility: Direct drop-in replacement for Lennox 68J3701 and diverse cross-over models including 3100-20Q2208.
• Silver Alloy Contacts: Engineered to minimize electrical arcing and extend the service life of the condensing unit.
• Standardized Mounting: Features a universal mounting plate design for fast, secure installation in existing control boxes.
• High Current Capacity: Rated for 35 Full Load Amps (FLA), providing a robust safety margin for 1.5 to 5-ton cooling systems.

Common Questions:

Will this contactor replace a 1-pole model?
Yes, this 2-pole contactor can replace a 1-pole unit, provided the voltage and amperage ratings match. Using a 2-pole unit provides the added benefit of breaking both legs of power to the compressor for increased safety during servicing.

Why is my contactor humming or buzzing?
Humming often indicates 24V coil chatter or debris between the contact points. If the Lennox 68J37 is buzzing, it typically signals a failure in the electromagnetic coil or worn contacts, necessitating a replacement.

Can I use this for non-Lennox equipment?
While this is a Lennox HVAC part, it is a definite purpose contactor that can be used in any brand’s equipment if the amperage, pole count, and coil voltage (24V) align with the manufacturer's specifications.

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.