HVACopedia

Carrier · Furnace

27.2 Super plug program missing or corrupted

Medium severity 59SC6A

What the control is telling you

The program in the super plug is missing, not recognized or corrupted (the label uses one description for 27.1-27.3).

Applies to: Carrier 59SC6A

Likely causes

  • Bad or wrong super plug
  • Poor connection at the super plug connector

Test and repair steps

  1. Remove the super plug from its 4-circuit connector and retry.
  2. If code 27 is still there, try a different super plug.
  3. If it still fails, replace the control.
  4. Program the new control with the rating-plate Model Program Number and confirm in inF.

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Source: Carrier 59SC6A Installation, Start-up, Operating and Service Instructions, Fig. 60 Service Label Information, p.54; Control Board Replacement p.53. Summarized in our own words; check the original manual for your model.

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For licensed technicians. Gas, electrical and refrigerant work must be done by a qualified, licensed person. Shut off power and gas before servicing, never bypass a safety control, and follow the manufacturer’s manual for the exact model; it and local codes always take priority. HVACopedia is not affiliated with any manufacturer; brand and model names only identify the equipment.