Signs of a Faulty Air Conditioner Compressor: What to Look Out For
Why is the compressor so important?
The compressor is the core of your air conditioning system. If it fails, your AC can’t cool or heat properly. Identifying issues early can help avoid costly repairs or full replacement.
1. No cool air from the unit
This is the most common symptom. A non-working compressor disrupts refrigerant circulation, causing cooling failure.
2. Unusual noises from the outdoor unit
Buzzing, rattling, or grinding sounds may indicate internal wear or damage within the compressor.
3. Frequent system shutdowns
If the unit frequently turns off by itself, the compressor might be overheating or tripping protective circuits.
Possible causes of compressor failure
- Voltage fluctuations or power surges
- Clogged or dirty coils
- End-of-life wear
- Low refrigerant levels
- Starter relay or control board failure
What to do if you suspect compressor failure?
Contact a technician for diagnosis. If replacement is needed, visit Only-Spares — we stock compressors for LG, Gree, Toshiba, Zanussi, Panasonic and more.
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