Heil 11J28-06881 OEM Unit Heater Control Board – Replacement for J28R06881.

Product Overview

The Heil 11J28-06881 Control Board is the official OEM replacement for the outdated J28R06881 board, designed to ensure safe, consistent operation of Heil unit heaters. This updated board is tailored for heating-only systems, eliminating unnecessary cooling relays while introducing a new LED diagnostic wire for easier troubleshooting.

Whether you’re servicing a garage heater, maintaining a commercial HVAC unit, or restoring performance in your Heil heater, this board delivers durability and efficiency.

Features & Benefits

• OEM Replacement: Built to Heil’s specifications to replace the discontinued J28R06881 board.

• Heating-Specific Design: Cooling relay removed to simplify operation in unit heaters.

• LED Diagnostic Upgrade: Includes a 20” wire for internal or external mounting to ease service checks.

• Streamlined Wiring: Fan motor wires now land on ACC1 terminals; no jumper required.

• Reliable Performance: Ensures safe ignition and efficient operation for Heil unit heaters.

Specifications

• Part Number: 11J28-06881 (Replaces J28R06881, 11J28R06881)

• Compatible Heil Series: Heating-only Heil unit heaters (consult model chart for match)

• LED Wire: 20” with lock nut for secure mounting

• Terminals: ACC1 fan connections replace outdated jumper system

• Function: Designed exclusively for heating mode

Installation Tips

• Shut off power before installation.

• Connect fan wires to ACC1 terminals—jumper no longer needed.

• Mount LED externally (11/16” hole required) for easier viewing, or position internally away from burner.

• Follow Heil service recommendations for best results.

FAQs

Q: Can this replace the J28R06881 board?
A: Yes, it is the direct OEM Heil replacement.

Q: Why is there no cooling relay?
A: Heil unit heaters operate only in heating mode, so the relay was unnecessary.

Q: How does the diagnostic LED work?
A: The LED connects to the control board and provides fault codes for faster troubleshooting.