SMEG
Loss of Cooling Capacity / Refrigerant Undercharge
Indoor unit runs but no cooling; air is room temperature or only slightly cooler
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Refrigerant leak in SMEG indoor coil, Refrigerant leak in outdoor coil, Loose flare joints on line set, Severely clogged expansion device
How to Fix / Troubleshooting
Safety first: Turn off the unit if you suspect a refrigerant leak (hissing, oil stains). Only licensed technicians may handle refrigerant.
- Check basic settings: Ensure the unit is set to COOL mode with a temperature at least 3–5°C below room temperature and that doors/windows are closed.
- Inspect for leaks: Look for oily spots on the indoor and outdoor coils and at flare connections. Oil residue is a strong indicator of a leak.
- Clean filters and coils: Dirty filters and coils can mimic low gas symptoms; clean them thoroughly.
- Call a technician: A professional must locate and repair leaks, evacuate the system, and recharge with the exact refrigerant type and weight specified on the SMEG nameplate.
Do not attempt to top up refrigerant without leak repair; this will lead to repeated failures.
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Repair Difficulty
Professional Required
5/5
Required Part
Refrigerant Line Set / Coils
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