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Bard 9043-429 - 40VA Control Transformer

Bard part number 9043-429 is an OEM 40VA control transformer used to step down incoming line voltage to the 24V control power your Bard wall mount air conditioner or heat pump needs for relays, contactors, and other low voltage controls. If your system has intermittent controls, a dead thermostat circuit, or a no call condition with verified line power present, a weak or failed transformer is a common root cause, and replacing it with the correct Bard-rated transformer helps restore stable control voltage and protects sensitive components from improper output. Match the VA rating and wiring terminations to your unit documentation before ordering to ensure proper fit and safe operation.


  • Technical Specifications
  • Product number: 9043-429
  • Manufacturer description: Transformer 40Va (4100800)
  • Weight: 2.200 lbs
  • HTS Code: "8504.31.4035"

$60.00