Your air conditioner relies on the compressor to cool your home. This internal component helps move refrigerant through the system to transport heat outside. While compressors often last between 10 to 15 years, some factors can cause early failure or malfunction. In this article, we’ll explain how a compressor works, the reasons it may fail, and what to do if it stops working. 

AC Compressor 101: How Does it Work?

The compressor is an essential part of the system, allowing the AC to cool a space effectively. It compresses refrigerant and helps move it through the system to absorb and release heat from the air. The compressor begins by squeezing the refrigerant and pushing it through the condenser coils to release heat into the outside air. The refrigerant then moves through the expansion valve, losing pressure and absorbing heat from the hot indoor air.

Why Do AC Compressors Fail?ac compressor failure

While most compressors will fail after 12 to 15 years, some factors can result in early failure. Some culprits that signal your AC compressor is not working include:

  • Refrigerant issues: Low or leaking refrigerant causes the compressor to work harder, causing it to get too hot and eventually fail.
  • Electrical problems: Issues such as voltage changes, short circuits, unbalanced currents, or loose connections can result in compressor failure.
  • Dirt and debris: If you do not clean your compressor regularly, dirt and debris can build up and blow the airflow, causing it to overheat.
  • Improper lubrication: The compressor will wear down quickly and fail if insufficient lubrication or the wrong type is applied.
  • Blocked suction lines: When debris, dust, or kinks block the AC suction lines, the compressor can overheat and fail.

Warning Signs Your AC Compressor is Failing

When your compressor begins to fail, it shows clear signs indicating it requires repair. If you notice any of the following, contact one of our technicians:

  • Strange noises: If your AC compressor starts to make strange noises, such as chatters or rumbles, this indicates an issue with the compressor switch that a professional should assess.
  • Poor airflow: If your system provides insufficient airflow or blows warm air, this can be a sign that your compressor is wearing down.
  • Leaking water: Puddles of water or moisture covering your AC unit can signal a refrigerant leak, which puts excess wear on the compressor. Once the refrigerant completely empties from your system, the compressor will fail. 
  • Circuit breaker constantly tripping: An overheating compressor can cause your circuit breaker to trip repeatedly as it draws too much power.
  • The unit is shaking: If your AC vibrates or shakes when it turns on, the compressor is likely failing and needs to be assessed.
  • Rising energy bills: When your compressor begins to fail, it has to work harder to produce the same results, causing your energy bills to increase as it becomes less efficient.

DIY vs. Professional AC Compressor Repair

While repairing your AC compressor on your own may seem tempting, it can result in costly repairs and early breakdown of your unit. Due to the complex nature of air conditioning systems, they should only be repaired by professionals with the proper training and experience. 

If you don’t repair it properly, additional parts may fail, it will compromise the airflow, or it may ultimately break down. Our technicians at Express Plumbing can diagnose the issue and repair it effectively and efficiently to ensure your unit cools your Idaho home for years to come.

Preventing AC Compressor Failure

The best way to prevent your AC compressor from failing is to schedule annual preventative maintenance. During your maintenance service, a technician will inspect, tune-up, and clean the system to ensure everything works properly. If they spot signs that the compressor or any other components are failing, they can repair them before they turn into costly issues.

Along with professional maintenance, there are some preventative steps you can do at home, including:

  • Assess the unit for refrigerant leaks
  • Only hire reputable HVAC technicians to repair the unit
  • Wipe dirt and debris from the coils
  • Ensure your AC is lubricated at least once per year
  • Keep the suction lines clear of blockage or kinks

Call Express Plumbing for AC Repair

If you’re having problems with your AC compressor or it’s showing signs of failure, contact our team at Express Plumbing. Our technicians are available around the clock for emergency HVAC repairs. One of our trained and licensed technicians will arrive at your home, diagnose the issue, and have it fixed before you know it.

We offer comprehensive HVAC services for residents in Boise and surrounding areas. Whether your AC requires repair, is due for maintenance, or is ready for replacement, we can help. Call or schedule an appointment online to book your service today! Make sure to ask about our flexible financing options and seasonal specials for Idaho residents.

Frequently Asked Questions

What causes an AC compressor to leak refrigerant?

An AC compressor can leak refrigerant due to worn or damaged seals, corrosion, manufacturer defects, improper installation, and wear and tear. If you suspect your AC compressor is leaking refrigerant, contact us immediately, as refrigerant leaks can pose a serious threat to your household’s health.

Can a failing AC compressor be repaired, or does it need to be replaced?

Our technicians can repair AC compressors in most situations. However, if your system is nearing the end of its life, it is advisable to replace the AC compressor, as this will save you money in the long run. When our technicians diagnose the issue with your AC unit, they’ll advise whether it’s best to repair or replace the system.

How much does it typically cost to repair or replace an AC compressor?

The cost of repairing or replacing an AC compressor depends largely on the extent of damage and the type of system you have. Contact our team for an exact quote.

Brad Jordan

company icon