Nordyne 919943a Integrated Hsi Control Board

Product Description

The NORDYNE 919943a is an integrated hot surface ignition (HSI) control board designed as a direct replacement for OEM control board 624693. It manages ignition sequencing, flame sensing, and blower timing within a gas furnace's control circuit. Licensed HVAC technicians install this board as part of a diagnostic repair when the original board has failed, exhibits fault codes, or no longer initiates the ignition sequence correctly. The board consolidates ignition control and system logic into a single unit, reducing component count and simplifying the diagnostic path during a service call.

This control board is suited for residential gas furnace applications where the original NORDYNE-sourced integrated HSI board has reached end of service life or has been damaged by electrical surge or heat stress. It is a direct OEM-style replacement for control board 624693 and is intended for installation by qualified HVAC service professionals familiar with low-voltage furnace control wiring and gas appliance safety procedures.

Key Features

• Direct OEM-style replacement for NORDYNE control board 624693
• Integrated hot surface ignition control consolidates ignition and blower sequencing logic
• Designed for residential gas furnace control circuit applications
• Single-unit replacement reduces diagnostic complexity during service
• Sold individually as a single unit

Compatibility

Designed as a direct OEM-style replacement for NORDYNE integrated HSI control board 624693.

Installation Notes

Installation should be performed by a licensed HVAC technician. Disconnect all electrical power to the furnace at the breaker and set the gas valve to the off position before removing the original control board. Follow the original wiring configuration when reconnecting low-voltage and line-voltage circuits. Verify proper igniter operation and flame signal after installation in accordance with the manufacturer service documentation and applicable local mechanical codes.

Technical Specifications

• Unit of Measure: Each

Standard Information

• Brand: NORDYNE
• Manufacturer Part Number: 919943a