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3 Common Problems That Can Develop with Your AC’s Compressor

Written By | Reviewed By Kevin Carney

Your air conditioning system is comprised of a number of components, but there are three key components that are responsible for much of the work: the condenser, the evaporator and the compressor. Of these three components, the compressor would be considered the most mechanical, as it is responsible for pressurizing the refrigerant in your system. Compressors do a great deal of work, and operating day in and out under great pressure can lead to repair issues, particularly if your air conditioning system hasn’t been properly maintained. Any repair issues that develop with your compressor should only be handled by a trained expert to ensure that the diagnosis is correct and that the repair is handled properly. The experts at Carney Plumbing Heating & Cooling have been helping customers in the North Wales, PA, area with their air conditioner repairs since 1976 and we can help you with yours. Just give us a call today and schedule an appointment.

Common AC Compressor Problems to Watch For

  • Issues with the motor – the compressor motor can malfunction for a few reasons, some of the more common ones being lack of lubrication, overheating and taking in liquid refrigerant (the refrigerant should always be in a gaseous state when entering the compressor). Issues with the motor will cause operational problems, and these problems will affect your entire AC system.
  • Electrical problems – there are two key areas where electrical problems can develop in your compressor. The first is with the wiring – it is not unusual for wiring to fray and/or corrode, which will affect electrical flow and the compressor’s operation. The second common electrical problem that can develop with your compressor is an issue with a capacitor. Your compressor has two capacitors, and problems with either one (or both) will affect how the compressor operates.
  • Problems with correct pressurization – your compressor pulls in and releases refrigerant in a pump-like action; for this action to work properly, the right level of pressurization has to exist inside the compressor.

Frequently Asked Questions

Question: What are common problems with an AC compressor?
Answer: Common AC compressor problems include motor issues, electrical problems, and problems related to refrigerants. The compressor depends on proper lubrication, safe operating temperatures, and refrigerant entering in the correct state. When one of these areas fails, the entire air conditioning system can be affected.

Question: How can electrical problems affect an AC compressor?
Answer: Electrical problems can prevent the compressor from starting or running correctly. Wiring may become frayed or corroded, which affects electrical flow. Compressor capacitors can also fail, and since the compressor relies on capacitors to operate properly, even one bad capacitor can create noticeable cooling problems.

Question: Why is refrigerant important to the AC compressor?
Answer: Refrigerants must enter the compressor as a gas, not as a liquid. If liquid refrigerant reaches the compressor, it can create serious operational problems and may damage the system. Refrigerant issues should always be handled by a professional because they require proper diagnosis, equipment, and safe handling.

Question: What are signs my AC compressor may be failing?
Answer: Signs of compressor trouble can include weak cooling, warm air from vents, unusual noises, hard starts, short cycling, or the system not running as expected. Because compressor problems can affect the whole AC system, it is best to schedule service before the issue leads to a larger breakdown.

Question: Should I call a professional for AC compressor problems?
Answer: Yes, compressor problems should be inspected by a trained HVAC professional. The issue may involve electrical components, refrigerant, overheating, or internal motor trouble. A technician can determine whether the compressor can be repaired or whether the air conditioning system needs a more extensive solution.

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