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Bard 8406-105BX - Low ambient fan cycle control

Bard part 8406-105BX is an OEM low ambient fan cycling control used on select Bard wall-mounted HVAC units to manage condenser fan operation during cold outdoor conditions. By cycling the condenser fan based on system pressure, this control helps maintain proper head pressure so the refrigeration circuit stays stable and the unit can operate more reliably in low ambient temperatures. It is commonly supplied as a boxed control and is a direct replacement for earlier Bard numbers such as 8406-105 and S8406-105, making it a dependable choice when replacing a failed fan cycling control and restoring correct cold-weather performance.


  • Technical Specifications
  • Product number: 8406-105BX
  • Manufacturer description: Low Ambient Fan Cycling Ctrl - Boxed
  • Weight: 0.650 lbs
  • HTS Code: "8415.90.8085"

  • Previous Versions
  • S8406-105 (Obsolete, superseded by 8406-105BX)
  • 8406-105 (Obsolete, superseded by S8406-105)

$40.00 *

* Orders less than $50 may incure a minimum order fee.

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.