Display shows F3; unit may not cool or may shut down shortly after startup.

Safety: Unplug the unit. Compressor and capacitor circuits can be dangerous; sealed-system work should be done by a licensed technician.

• Listen for compressor: When the unit calls for cooling, listen for a humming or clicking sound from the compressor. Rapid clicking or brief hum then stop suggests overload tripping.
• Check supply voltage: Verify correct voltage at the outlet. Low voltage can cause high current draw and F3 errors.
• Inspect wiring: With power off, check compressor terminals and wiring for burnt connectors or loose spade terminals.
• Start components: If your Soleus Air model uses a start relay or capacitor, inspect and replace if visibly damaged. Use only parts with matching ratings.
• Professional diagnosis: If F3 persists, the compressor may be internally damaged or the control board may be misreading current. Contact a professional for amp-draw testing and sealed-system evaluation.