Lennox 28G38 Relay

When you are troubleshooting a control circuit failure, the Lennox 28G38 Relay is the reliable OEM replacement you need to restore proper sequence of operation. This heavy-duty 24V DPDT relay is engineered for high-cycle applications where precise switching of multiple circuits is required. Featuring a Double Pole Double Throw configuration, this component allows for the simultaneous management of two separate electrical paths, making it ideal for HVAC control board integration or combustion air relay functions. With a robust 10 Amp contact rating (and up to 13 Amps in specific configurations), it handles inductive loads across common Lennox residential and commercial units, including GCS10 and GCS16 models. The plug-in relay design ensures a fast, secure connection to the base, reducing field time during emergency calls. As a genuine Lennox replacement part, it maintains factory-specified electrical tolerances and impedance, preventing the nuisance trips or premature contact pitting often seen with generic alternatives. This 24VAC coil relay is the technician's choice for restoring system reliability and safety.

• OEM Compatibility: Exact electrical match for Lennox 28G38 and 28G3801, ensuring seamless integration with existing 24V control circuits.
• DPDT Versatility: Dual-pole switching provides flexibility for managing multiple loads or feedback loops from a single 24V coil trigger.
• Durable Contact Points: Rated for up to 13 Amps, the contacts are built to withstand high-frequency switching without sticking or excessive wear.
• Compact Plug-In Form: Standardized footprint allows for rapid installation in crowded electrical cabinets and Lennox control panels.

What is the primary function of the Lennox 28G38 in a rooftop unit?
In many Lennox systems, the 28G38 serves as a combustion air relay (K13) or a general-purpose pilot duty relay. It bridges the low-voltage thermostat signal to higher-voltage components like blower motors or inducer fans.

Can I use this relay for both AC and DC applications?
This specific model is optimized for 24VAC systems commonly found in North American HVAC equipment. Always verify your source voltage with a multimeter before installing to prevent coil burnout.

How do I confirm if my specific Lennox model is compatible?
This relay fits over 400 Lennox models, including the GCS series. Check your service manual for reference part number 28G38 or 66255112555 to ensure a direct fit.

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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.