Bard 9043-423 - High altitude kit with pressure switch

Bard part number 9043-423 is an OEM high altitude kit with a pressure switch, used to help certain Bard wall-mounted HVAC units operate more reliably at higher elevations where reduced air density can affect pressure proving and safe equipment operation. This kit is typically applied when a unit is installed above the standard altitude range and you need the correct factory-approved pressure switch setup to maintain proper safety interlocks and heating performance. Because high altitude requirements vary by model and installation elevation, verify compatibility by matching the 9043-423 kit to your specific Bard unit model and the altitude instructions in the appropriate Bard service manual before ordering or installing.

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