Aircon Repair & Troubleshooting in Singapore

If problems persist after recent general servicing, or if there are specific symptoms like error codes on the display, unusual noises such as rattling, buzzing, or clicking, ice forming on the copper pipes or evaporator coil, the unit cycling on and off repeatedly, or complete failure to cool — these indicate a mechanical or electrical fault that requires professional aircon repair and troubleshooting. General servicing addresses dirt and drainage, but component faults like a failing compressor, defective PCB, or refrigerant leak require targeted diagnosis and parts replacement.

Several possible causes: low refrigerant gas due to a leak (the most common cause of weak cooling after servicing — requires leak repair and gas top-up), a failing compressor that cannot compress refrigerant effectively, a defective thermistor sending incorrect temperature readings to the PCB, a faulty PCB board that is not controlling the system properly, or a fan motor that has lost speed and is not circulating enough air across the evaporator coil. Our technician checks each of these systematically to identify the exact fault.

Error codes vary by brand and model. Common examples: Daikin units may flash green or orange lights in patterns indicating sensor faults, PCB issues, or compressor errors. Mitsubishi units display codes like P1 (intake sensor error), P2 (pipe sensor error), or E6 (communication error between indoor and outdoor units). Panasonic units show codes like H11 (indoor/outdoor communication error) or F95 (cooling cycle abnormality). LG units display CH codes for various sensor and component faults. When you contact us, note the exact code or flashing pattern — this gives our technician a head start on diagnosis before arriving.

Different sounds indicate different problems. Rattling or vibrating usually means loose components — a loose fan blade, detached casing screw, or worn motor mounting. Buzzing often indicates an electrical issue such as a failing capacitor or contactor. Clicking sounds when the unit starts or stops can signal a defective relay or compressor starting issue. Hissing or bubbling sounds from the indoor unit may indicate a refrigerant leak in the evaporator coil. Grinding sounds suggest a fan motor bearing failure. Each sound points to a different component, and our technician uses these audio clues as part of the diagnostic process.

The most common cause is a clogged condensate drainage pipe — slime, algae, and dust gradually block the drain over time, especially in Singapore's humid conditions. Other causes include a dirty air filter restricting airflow and causing ice to form on the evaporator coil (which then melts and overflows the drain pan), a cracked or misaligned drain pan, incorrect installation angle preventing proper drainage, or a damaged condensate pump in units that rely on pump-assisted drainage. Regular servicing every 3-4 months prevents most water leak issues.

Yes, we repair all major aircon brands found in Singapore homes and offices: Daikin, Mitsubishi Electric, Panasonic, LG, Samsung, Fujitsu, Midea, Toshiba, and less common brands. Each brand has specific component designs and error code systems, and our technicians are experienced with the differences that affect diagnosis and repair.

We carry commonly needed parts on every call-out, including capacitors, thermistors, fan motors, and PCB boards for popular brands and models. For specific or less common components, we may need to source them from suppliers, which typically takes 1-2 business days. We will confirm part availability and expected timeline before proceeding with any repair.

It depends on the specific problem and the unit's overall condition. For aircon units over 10 years old with major component failures — particularly a compressor replacement, which is the most expensive repair — upgrading to a newer, more energy-efficient unit is often the more sensible investment. Newer units with R32 refrigerant use up to 10 percent less electricity and have a lower environmental impact. However, for minor repairs on older units, fixing the issue is usually more cost-effective than full replacement. We assess honestly and advise based on your specific situation — we never push unnecessary replacements.