Sterling 11J28-06881 Unit Heater Control Board – OEM Replacement (11J28R06881 / J28R06881).
Product Overview
The Sterling 11J28-06881 Control Board is the updated OEM replacement for the discontinued J28R06881 board, designed to restore dependable operation to Sterling RT, TF, SF, and Garage Guy (GG) series unit heaters. Built for heating-only applications, this redesigned board removes unnecessary cooling components and enhances troubleshooting with a flexible LED diagnostic feature.
Whether you’re repairing a garage heater, servicing a commercial unit, or replacing an aging control board, this genuine Sterling replacement part ensures reliable ignition, efficient performance, and long-term durability.
Features & Benefits
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OEM Replacement: Direct replacement for the obsolete J28R06881 control board.
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Heating-Only Design: Cooling relay eliminated for simplified operation in unit heaters.
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Improved Troubleshooting: Comes with a 20” diagnostic LED wire for easier visibility and service.
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Streamlined Wiring: Fan motor wires now connect directly to ACC1 terminals—no jumper needed.
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Wide Compatibility: Engineered for Sterling RT, TF, SF, and GG unit heater models.
Specifications
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Part Number: 11J28-06881 (Replaces 11J28R06881, J28R06881)
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Compatible Sterling Series & Models:
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GG Series (Garage Guy): GG-30, GG-45, GG-60, GG-75, GG-105, GG-120
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RF Series: RF-30 through RF-400
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TF Series: TF-30 through TF-400
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SF Series: SF-30 through SF-400
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LED Wire: 20” with lock nut for external or internal mounting
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Terminals: Fan motor wires connect to ACC1; no jumper required
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Function: Designed exclusively for heating-only Sterling unit heaters
Installation Tips
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Disconnect Power: Always cut power before replacing HVAC components.
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Wiring Update: Connect fan motor wires to ACC1 terminals; jumper wires are not required.
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LED Mounting Options:
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External Mounting: Drill an 11/16” hole in the cabinet panel for improved visibility; secure with included lock nut.
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Internal Mounting: Place the LED inside the electrical compartment, ensuring it is away from burner components.
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Placement Recommendations:
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Tubular duct & low-profile units: front panel mounting preferred.
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Other Sterling unit heaters: bottom of electrical compartment provides best access.
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FAQs
Q: Does this replace the older J28R06881 board?
A: Yes. The Sterling 11J28-06881 is the official OEM replacement and fully compatible with listed models.
Q: Why was the cooling relay removed?
A: Sterling unit heaters operate in heating mode only, making the cooling relay unnecessary.
Q: Is professional installation required?
A: Experienced technicians are recommended, but HVAC-skilled homeowners may perform the replacement.
Q: How do I use the LED wire?
A: It can be mounted externally for easy diagnostics or left in the electrical compartment.
Q: What series does this board fit?
A: Sterling GG, RF, TF, and SF series unit heaters (see specifications for full model list).
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