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Bard 8612-029BX - MC3000 Controller Board

The Bard 8612-029BX MC3000 Controller Board is an OEM control board used in Bard lead lag control applications to manage staging and coordinated operation of compatible Bard HVAC equipment. This board is a direct replacement for older part number 8612-029 and is commonly referenced as the standard MC3000 relay/control board, making it a solid choice when you are troubleshooting a no-start, improper sequencing, or intermittent control issue tied to the lead lag controller. As a genuine Bard replacement part, 8612-029BX is built to match original electrical connections and control logic so you can restore proper system operation once you confirm compatibility by model and serial number.


  • Technical Specifications
  • Product number: 8612-029BX
  • Manufacturer description: MC3000 Controller Board -Boxed
  • Weight: 0.900 lbs
  • HTS Code: "8415.90.8085"

  • Previous Versions
  • 8612-029 (Obsolete, superseded by 8612-029BX)
  • 8612-019 (Obsolete, superseded by 8612-029)

$295.00

What does the "BX" suffix mean?

Bard uses suffixes like "BX" to manage parts internally. These do not change the physical form or function of the part.

A part number ending in "BX" simply means it is packaged in a box for shipping, rather than for internal assembly use.

Example: 8406-142BX is physically identical to 8406-142.