F5 appears; unit may not exhaust hot air properly (common on portable models with hose).

Safety: Unplug the portable air conditioner before adjusting hoses or panels.

Steps:

• Inspect exhaust hose: Ensure the hose is not kinked, crushed, or extended beyond the maximum recommended length. Straighten and shorten if necessary.
• Check exhaust outlet: Verify the window kit and outdoor vent are not blocked by screens, covers, or debris.
• Clean filters: Dirty filters can cause high exhaust temperatures. Clean all intake filters.
• Locate exhaust sensor: On some Hotpoint portable units, a sensor is attached near the exhaust duct. Inspect wiring and attachment; replace the exhaust temperature sensor if damaged.

Test: After correcting airflow and any sensor issues, restore power and run the unit to confirm F5 is cleared.