Why Your Air Conditioner Compressor Makes Unusual Noises or Won't Start: Identifying Causes and Finding Solutions

The compressor is the "heart" of your air conditioner, responsible for circulating refrigerant and ensuring air cooling. If you notice that the compressor has started humming, clicking, or won't start at all, this is a serious signal of potential problems that require immediate diagnosis. In this article, we will look at the main reasons for these symptoms and tell you what to do in such situations, relevant for air conditioner owners in Kyiv and throughout Ukraine. And if you need to replace the compressor or other spare parts, you can always find them in our online store Only-Spares.

Main Reasons for an Air Conditioner Compressor Humming:

• Capacitor issues: A worn or faulty starting capacitor can cause the compressor to hum when trying to start.
• Outdoor unit contamination: Dust and dirt accumulated on the outdoor unit's heat exchanger can lead to compressor overheating and abnormal operation, accompanied by humming.
• Low refrigerant level: Insufficient refrigerant can force the compressor to work under increased load, causing humming.
• Worn compressor bearings: Over time, the compressor bearings can wear out, leading to vibration and loud humming during its operation.
• Electrical problems: Unstable mains voltage or wiring issues can affect the compressor's operation and cause humming.

Main Reasons for an Air Conditioner Compressor Clicking:

• Thermal overload tripping: Overheating of the compressor can lead to periodic tripping of the thermal protection, accompanied by clicking and compressor shutdown.
• Compressor relay issues: A faulty relay on the control board can cause clicking when trying to turn the compressor on or off.
• Internal mechanical damage to the compressor: In rare cases, clicking may be a sign of internal mechanical failures of the compressor.

Main Reasons Why an Air Conditioner Compressor Won't Start:

• Faulty starting capacitor: This is one of the most common reasons why the compressor cannot start and may only hum.
• Tripped thermal overload of the compressor: After overheating, the compressor needs time to cool down before it can restart. If the protection trips constantly, this indicates a serious problem.
• Control board issues: A faulty relay or other components on the control board can block the power supply to the compressor.
• Locked compressor: Mechanical seizure of the compressor is a serious breakdown that often requires a complete compressor replacement.
• Sensor problems: Faulty sensors can transmit incorrect information to the control board, blocking the compressor from starting.
• Low mains voltage: Insufficient voltage can cause the compressor not to have enough power to start.

What to Do If Your Air Conditioner Compressor Hums, Clicks, or Won't Start?

1. Turn off the air conditioner and disconnect it from the power supply for safety.
2. Visually inspect the outdoor unit. Clean it of visible dirt and dust.
3. Check the mains voltage. Make sure it matches the nominal values for your air conditioner.
4. Do not attempt to repair the compressor yourself. This is a complex and dangerous process that requires specialized knowledge and tools.
5. Contact a qualified technician for professional diagnostics and to determine the exact cause of the problem.
6. If it is necessary to replace the compressor or other spare parts, you can find a wide selection of high-quality components in our online store Only-Spares in Kyiv with delivery throughout Ukraine.

Ignoring unusual noises or problems with starting the compressor can lead to more serious breakdowns and costly repairs. Timely diagnosis and replacement of faulty spare parts will help restore the efficient operation of your air conditioner. Choose reliable components in the Only-Spares online store – your reliable partner in the world of air conditioner parts in Kyiv and Ukraine!

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