Rcd hk42fz039 Furnace Control Board

Product Description

The RCD hk42fz039 is a furnace control board designed to regulate and manage the core operating sequences of a gas furnace. It handles ignition, blower timing, limit monitoring, and multi-speed fan control within the furnace control circuit. Measuring 9.7 inches long, 8.05 inches wide, and 2.5 inches tall and weighing 0.725 pounds, this is a direct-replacement board built to OEM specifications. Licensed HVAC technicians install this board during scheduled maintenance or emergency service calls when the original board has failed or caused fault codes.

This control board is suited for residential forced-air gas furnace applications. It fits within the control compartment of single-stage and multi-stage furnace platforms where the original hk42fz039 board was factory-installed. Compatible model numbers listed in the product data include 59SP5A040E141210, 59SP5A080E171216, and 59SP5A040E141110. Install this board as a like-for-like replacement when diagnosing board-level faults such as lockout conditions, failed ignition sequences, or blower control anomalies.

Key Features

• OEM-specification replacement for the original hk42fz039 control board
• Manages ignition sequencing, blower timing, and limit-switch monitoring
• Compact form factor: 9.7 inches x 8.05 inches x 2.5 inches for direct drop-in fitment
• Lightweight at 0.725 pounds, simplifying single-technician installation
• Built to exact dimensional and electrical tolerances of the original board

Compatibility

Compatible with Carrier furnace models 59SP5A040E141210, 59SP5A080E171216, and 59SP5A040E141110 as stated in product data.

Installation Notes

Installation should be performed by a licensed HVAC technician in accordance with local mechanical codes and the furnace manufacturer service manual. Disconnect all electrical power to the furnace at the disconnect switch and breaker before removing the existing board. Transfer wiring harnesses and connectors one at a time to the replacement board to reduce the risk of miswiring. Confirm all connectors are fully seated and the board is secured before restoring power and cycling the system.

Technical Specifications

• Length: 9.7 inches
• Width: 8.05 inches
• Height: 2.5 inches
• Weight: 0.725 pounds

Standard Information

• Brand: RCD
• Manufacturer Part Number: hk42fz039