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Green printed circuit board with electronic components and edge connectors

Dayton

Dayton 11J28R06881 Main Control Board for HVAC

SKU CH-QQSZ-R7DGF

Main control board compatible with numerous Grainger HVAC units including 32V237 through 32V263 and 4LX51, 4LX52

  • Direct replacement for many Grainger HVAC units
  • Exact fit for Grainger items 32V237 through 32V263
  • Compatible with Grainger models 4LX51 and 4LX52
  • New Dayton board restores original system control
  • Ready to install with no programming required

Dayton 11J28R06881 Main Control Board

This new Dayton main control board manages the heating, ventilation and air-conditioning system in compatible RVs. It is the direct replacement for the factory unit that governs climate functions inside the vehicle.

Compatibility with Grainger HVAC units

The board is designed for use with Grainger items 32V237 through 32V263 and models 4LX51 and 4LX52. Installing it restores full electronic control without requiring changes to the surrounding ductwork or wiring harnesses.

Replaces a failed or ageing OEM board

When the original controller no longer communicates with the HVAC modules, this part returns the system to specification. The upgrade is worth it when diagnostic codes point to the main board rather than to sensors or actuators.

Highlights

  • Direct replacement for many Grainger HVAC units
  • Exact fit for Grainger items 32V237 through 32V263
  • Compatible with Grainger models 4LX51 and 4LX52
  • New Dayton board restores original system control
  • Ready to install with no programming required

Specifications

BrandDAYTON

Questions about this item

How does the 11J28R06881 board handle continuous compressor cycling during peak cooling demand?

The board manages compressor staging and defrost sequencing for the listed Grainger HVAC units, maintaining set-points through repeated start-stop cycles without external timers.

What temperature rise should I expect from the 11J28R06881 relay coils after 24 hours of constant HVAC operation?

Relay coils on the 11J28R06881 run at low voltage and stay warm to the touch; the board is rated for continuous duty inside the manufacturer-specified enclosure.

Which Grainger-sourced HVAC units must already be installed for the 11J28R06881 main control board to function?

The board is designed for Grainger items 32V237 through 32V263 and 4LX51, 4LX52; one of those units must be present for the board to connect and operate.

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