Fujitsu 12,000 BTU 18 SEER Slim Duct Mini Split, 8 in Height, Quiet Operation 24 Error Fix: Abnormal Rise in Discharge Temperature

Error code 24 on the Fujitsu 12,000 BTU 18 SEER Slim Duct Mini Split, 8 in Height, Quiet Operation means: Abnormal Rise in Discharge Temperature. The compressor discharge temperature is rising abnormally — caused by low refrigerant charge, a refrigerant restriction (kinked line set, clogged filter drier), TXV malfunction, or compressor valve wear; this is commonly seen in multi-zone systems when too many indoor heads are running simultaneously and the single outdoor unit cannot keep up; check refrigerant charge and superheat/subcooling values

The most successful fix is "Perform Refrigerant Charge and TXV Inspection with HVAC Gauges" (hard difficulty, ~120 minutes). Estimated DIY cost: $0-$20. 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 ("Perform Refrigerant Charge and TXV Inspection with HVAC Gauges") is rated hard difficulty and takes about 120 minutes. Tools needed: HVAC manifold gauge set, Thermometer, Vacuum pump, Refrigerant scale.

DIY cost: $0-$20. Professional repair typically costs $250-$400. Many homeowners save money by trying the top-ranked community fix first.

The Fujitsu 12,000 BTU 18 SEER Slim Duct Mini Split, 8 in Height, Quiet Operation has 8 other known error codes, including: 01 (Indoor Unit PCB Error), 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), and 3 more.

Error code 24 also appears on 8 other Fujitsu models: 12,000 BTU 25 SEER Halcyon Wall-Mount Mini Split with WiFi Control, 15,000 BTU 25 SEER Halcyon Wall-Mount Mini Split with Energy Saving Mode, 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.