Fujitsu 15,000 BTU 25 SEER Halcyon Wall-Mount Mini Split with Energy Saving Mode 01 Error Fix: Indoor Unit PCB Error

Error code 01 on the Fujitsu 15,000 BTU 25 SEER Halcyon Wall-Mount Mini Split with Energy Saving Mode means: Indoor Unit PCB Error. The indoor unit control board (PCB) has malfunctioned — the EEPROM may be corrupted, a component on the board may have failed due to a power surge, or there is a solder joint failure; try a power reset by turning off the breaker for 5 minutes; if the error returns, the indoor PCB needs replacement; note the specific sub-code on the wired controller if available

The most successful fix is "Replace Indoor Unit PCB to Resolve Persistent PCB Error" (hard difficulty, ~90 minutes). Estimated DIY cost: $150-$220. HomeMD has 2 community-ranked fixes for this error.

This error is rated medium severity. It should be addressed soon, but your appliance may still function in a limited capacity.

Yes — the top-ranked community fix ("Replace Indoor Unit PCB to Resolve Persistent PCB Error") is rated hard difficulty and takes about 90 minutes. Tools needed: Phillips screwdriver, T20 Torx screwdriver, Multimeter, Anti-static wrist strap.

DIY cost: $150-$220. Professional repair typically costs $300-$450. Many homeowners save money by trying the top-ranked community fix first.

The Fujitsu 15,000 BTU 25 SEER Halcyon Wall-Mount Mini Split with Energy Saving Mode has 8 other known error codes, including: 02 (Communication Error — Indoor to Outdoor Unit), 03 (Communication Error — Remote Controller to Indoor Unit), 04 (Outdoor Unit PCB Error), 05 (Outdoor DC Fan Motor Open/Short Circuit), 06 (Indoor Fan Motor Lock or Abnormal Speed), and 3 more.

Error code 01 also appears on 8 other Fujitsu models: 12,000 BTU 18 SEER Slim Duct Mini Split, 8 in Height, Quiet Operation, 12,000 BTU 25 SEER Halcyon Wall-Mount Mini Split with WiFi Control, 24,000 BTU 19 SEER Wall-Mount Mini Split with Low Ambient Cooling, 36,000 BTU 18 SEER Multi-Zone Heat Pump Outdoor Unit, 48,000 BTU Multi-Zone Heat Pump Outdoor Unit, 9,000 BTU 33 SEER Halcyon Wall-Mount Mini Split, WiFi Ready, and 2 more. The fix may vary by model, so check each model's specific page for tailored repair steps.