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Replace Sub-Zero Model 642 with Model BI-42UFD


  • Are the opening size and electrical requirements the same for model 642 and Classic series (BI) model BI-42UFD?
  • Are the water location and panels the same for model 642 and model BI-42UFD?
  • Do panels transfer from an old unit to a new unit?
  • Can old panels go on a new unit?
  • 642 compatibility



Opening SizeElectrical RequirementsWater RequirementsItems to Verify
  • No change.
  • No change.
  • No change.
  • Whether the original unit had a reduced height grille (to reduce overall unit height to 83") or an extended grille (to increase overall height above 84"). If so, order a new reduced height or extended height grille for the new model. See Classic Series (BI) Grille Height Options.
  • Whether the new model door clearance fits if installed near an island. See the Sub-Zero Design Guide for details.


  • The panels from model 642 will not fit model BI-42UFD.
  • The BI-42UFD is a French door model, so two door panels are needed for the refrigerator. New custom panels would be needed.
  • Side panels cannot be reused.

See also:

Refer to the Sub-Zero Design Guide for design specifications and the product Installation Guide for further installation information.


Need further assistance? Contact Customer Care at 800.222.7820 or provide your information below and request a Customer Care representative contact you.

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