⚠ Safety note: This guide involves working with electricity, plumbing. If you're not completely sure about every step, stop and call a licensed professional. Before you start, always switch off the power at the breaker or close the main water/gas valve.
1 Prepare safe working conditions
Turn off the unit from the outlet, close the water supply if there is one, and wait for hot parts to cool. Prepare the instruction booklet for the exact model, a lamp, and a dry work surface.
⚠ Warning: Do not open parts of the device with mains power, capacitors, heaters, or refrigeration circuits. Leave such diagnostics to qualified service.
2 Determine the exact symptom
Turn off the unit and check whether filters are dirty or the indoor unit is frozen. Do not use the air conditioner while water is dripping near electrical outlets.
3 Check the most common cause
Wash the accessible filters, dry them completely, and check that the end of the drainage hose outside is clear and directed downward.
4 Remove the cause without improvisation
After defrosting, test the cooling. A clogged pan, faulty condensate pump, poor drainage slope, or refrigerant shortage requires service.
? Tip: Take photos of the initial state and change only one thing at a time. This way you will more easily recognize what really solved the problem.
5 Assemble and test safely
Assemble all accessible parts and run a short supervised test. If leaks, burning smell, sparking, or guard ejection occur, immediately turn off the unit and call service.
When to call a professional: If the job involves changes to the electrical panel, the main gas line, or load-bearing walls/beams — or if you're not sure how it will turn out — this is not a DIY task. Hire a licensed professional.