Carrier · Furnace

25.5 Installer settings corrupted

Low severity 59SC6A

What the control is telling you

Field installer settings are corrupted; the control runs on default installer settings.

Applies to: Carrier 59SC6A

Likely causes

Corrupted settings memory

Test and repair steps

Re-select the installer settings (Ht, CL, Cfn, HoD, Cod, dir, tnn) through the menu.
If the code stays, reprogram the control with the rating-plate Model Program Number.
After reprogramming, re-enter the installer settings and verify airflow and temperature rise.

Settings for these units

Filter sizes by casing width and filter cabinet · 59SC6A
Minimum clearances to combustibles · 59SC6A

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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.

Homeowner looking at this code? See what it means for you and when to call a technician.

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.