Lennox 70W31 Electronic Control Module Kit Furnace

Product Description

The LENNOX 70W31 is an electronic control module (ECM) kit designed for furnace applications. This kit provides the control electronics necessary to manage furnace operation, including motor speed regulation and system communication functions typical of ECM-equipped heating systems. It is installed by licensed HVAC technicians as a direct service replacement when the original control module has failed or is no longer functioning within specification. The 70W31 weighs 3.1 pounds and is packaged as a complete kit to support field replacement.

This ECM kit is intended for use in furnace systems that rely on electronically commutated motor controls. It is suited for residential forced-air heating applications where ECM technology is used to improve motor efficiency and airflow management. Technicians working on systems that show blower irregularities, fault codes related to motor control, or failed ECM diagnostics will typically encounter this type of replacement kit during a service call.

Key Features

• Complete ECM kit configuration supports full field replacement without sourcing separate components
• Designed for furnace ECM motor control applications
• Lightweight assembly at 3.1 pounds for easy handling during installation
• OEM-style replacement maintains original system control logic and motor communication

Compatibility

Designed as an OEM-style replacement electronic control module kit for LENNOX furnace systems equipped with ECM motor controls.

Installation Notes

Installation should be performed by a qualified HVAC technician. Always disconnect power at the breaker and verify the system is de-energized before removing or installing any electronic control module. Follow the furnace manufacturer service documentation for connector orientation and module mounting sequence. Refer to applicable local codes and NEC requirements when servicing electrical components in HVAC equipment.

Technical Specifications

• Type: Electronic Control Module Kit
• Application: Furnace
• Weight: 3.1 pounds

Standard Information

• Brand: LENNOX
• Manufacturer Part Number: 70W31