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Bard 5603-003 - LP Spring Kit

Bard part 5603-003 is the OEM 391937 LP Spring Kit used in select Bard HVAC gas heating assemblies to set the gas valve regulator correctly for LP (propane) operation, helping the unit maintain stable manifold pressure and dependable heat output. If your Bard wall mounted HVAC unit has been converted to LP or is being serviced for fuel type changes, replacing worn or incorrect regulator springs with the proper Bard kit is a straightforward way to restore proper valve response and safe, consistent burner performance. Always confirm compatibility by matching the part number to your unit model and service literature before ordering, since LP conversion components can vary by series and gas valve style.


  • Technical Specifications
  • Product number: 5603-003
  • Manufacturer description: 391937 LP Spring Kit
  • Weight: 0.016 lbs
  • HTS Code: "8415.90.8085"

$12.00 *

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