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Lennox 49K04 240V DPDT relay, compact rectangular housing with terminal pins

Lennox

Lennox 49K04 240V DPDT Relay

SKU CH-C9ES-A5SP3

240V DPDT relay switches HVAC circuits in RV heating and cooling systems

  • 240 V coil suits high-voltage HVAC control
  • DPDT switching handles two circuits with one relay
  • Lennox 49K04 matches OEM replacement specs
  • New condition ensures reliable contact performance
  • First listed by manufacturer in 2025

Lennox 49K04 Relay Application

The Lennox 49K04 is a 240V DPDT relay designed for HVAC systems in recreational vehicles. It provides double-pole double-throw switching for controlling heating and cooling circuits. This component suits RV owners and technicians maintaining climate-control equipment.

Electrical Switching Capability

The double-pole double-throw configuration allows the relay to manage two separate circuits simultaneously with a single coil signal. This arrangement simplifies wiring for compressor and fan sequences in RV air-conditioning units. The 240V rating matches common North American RV shore-power supplies.

Installer Suitability

The relay fits service calls where a direct Lennox replacement is specified for 240V DPDT control logic. It does not address low-voltage signal circuits or single-pole switching needs. Builders requiring different coil voltages or contact arrangements should verify specifications before purchase.

Highlights

  • 240 V coil suits high-voltage HVAC control
  • DPDT switching handles two circuits with one relay
  • Lennox 49K04 matches OEM replacement specs
  • New condition ensures reliable contact performance
  • First listed by manufacturer in 2025

Specifications

BrandLENNOX

Questions about this item

How often does the 49K04 relay need replacement under normal HVAC cycling?

The 49K04 relay is a solid‑state switching component with no moving contacts; it typically lasts the life of the HVAC unit unless a voltage surge or sustained over‑current occurs.

What electrical limit is reached first when the 240 V DPDT relay runs continuously?

The coil’s 240 V rating is the primary limit; exceeding the rated coil voltage or ambient temperature will cause thermal shutdown before contact wear becomes an issue.

Does the 49K04 relay generate noticeable heat or noise during all‑day operation?

The sealed relay operates silently and produces only minimal coil warmth, well within normal HVAC enclosure temperatures during continuous duty.

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