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Trane · Furnace troubleshooting

Reading and clearing fault history - Trane S-Series IFC

What is going on

How to pull up stored faults, wipe them and reset the furnace control to factory values with the Menu and Option buttons.

Likely causes

  • Intermittent faults that are no longer active
  • Settings changed by others

Check in this order

  1. Warning: Touch only the Menu and Option buttons on a powered board.
  2. Active faults scroll with Menu to 'err'. Stored faults: scroll to 'L6F' and press Option to step through the last 6.
  3. To erase history inside L6F hold Option 5 seconds or more; three dashes flashing 3 times confirm it is cleared.
  4. Factory defaults with the display at idle, press Menu and Option together for 15 seconds; 'FD' flashing 3 times confirms.
  5. While running, the display alternates mode and airflow every 2 seconds; an E-code flashes in between if a fault is active.

Applies to: Trane S8V2 (80%, 2-stage, variable speed, Link) and S8B1 / S8X1 / S8X2 (80%, 1- and 2-stage)

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Source: Trane FNR-SVX003A-EN and 18-CE14D1-1A-EN - section Fault Code Recovery. Written in our own words; check the manual for your exact model.

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.