Lennox 20G52 Relay

The Lennox 20G52 Relay is a heavy-duty DPDT 24V blower relay designed for precise motor control in residential and light commercial HVAC systems. Featuring a double-pole, double-throw contact configuration, this induction-rated component allows technicians to manage two separate circuits simultaneously, ensuring seamless switching between fan speeds or system modes. With an 1/8 HP motor rating and a 5 Amp contact capacity, the 20G52 is engineered to handle the inductive loads typical of blower assemblies without premature contact pitting or failure.

As a genuine Lennox OEM replacement part, this relay provides an exact drop-in fit for legacy air handlers and furnace units, including popular models like the CHA24 and GCS24 series. The 24VAC coil is optimized for standard low-voltage control circuits, providing reliable electromagnetic switching even in demanding high-cycle environments. For contractors, using the 20G5201 blower relay ensures that the system maintains its original performance specifications and electrical safety certifications without the risks associated with universal "will-fit" alternatives.

Key Benefits

• Dual-Circuit Control: The DPDT configuration allows for advanced switching logic, managing multiple system components from a single 24V signal.
• OEM Compatibility: Designed specifically for Lennox HVAC equipment, eliminating the need for mounting modifications or terminal re-wiring.
• Inductive Load Rating: Rated at 1/8 HP, ensuring the contacts can handle the inrush current of blower motors for long-term operational stability.
• Compact Open-Frame Design: Facilitates easy inspection of contacts and fits securely within standard electrical control boxes.

Common Questions

Can I use this relay to replace a SPDT or single-pole relay?
While a DPDT relay can often perform the functions of a SPDT relay by leaving one set of contacts unused, always verify the specific wiring diagram for your Lennox unit to ensure the 24V coil amperage draw is compatible with your transformer's VA rating.

What are the signs that a Lennox 20G52 blower relay has failed?
Common failure symptoms include a "clicking" sound without the blower engaging, the fan remaining stuck in the "on" position regardless of thermostat demand, or visible carbon buildup on the internal contacts.

Is this relay compatible with 120V or 240V blower motors?
The contacts are rated for standard line voltage applications (up to 5A at 125VAC), but the coil voltage must be 24V. Ensure your control circuit is outputting 24VAC to avoid damaging the relay coil.

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.