Failed Compressor: Repair vs. Replace Entire AC Unit

The compressor is the heart of your air conditioner, so when AC compressor failure strikes, it can completely prevent your system from cooling your home. Explore the basics of how an AC compressor works, the unique challenges that the Denver climate poses for your compressor, and how the pros at Sanders & Johnson can help with expert local AC repair and replacement.

Key Takeaways

The AC compressor pressurizes and circulates refrigerant through your air conditioning system.
Denver’s high altitude puts a strain on your AC and may shorten the lifespan of the AC compressor.
Compressor breakdowns are considered a major AC repair, and it may make more sense to replace your entire air conditioner if the warranty is no longer valid.

What Does an AC Compressor Do?

An AC compressor is the part inside your air conditioner that pressurizes the refrigerant and moves it through the system. Think of refrigerant as the blood inside your AC — it circulates through the system, absorbing the heat from the indoor air and releasing it outside. To do this, it changes between liquid and gas states as it absorbs and releases heat energy. The compressor is like the heart of the system, pushing refrigerant between the indoor and outdoor units.

When there’s a problem with your AC compressor, the refrigerant isn’t pressurized or circulated, so your AC can’t cool your home.

Why Do AC Compressors Go Bad?

In addition to inevitable wear and tear, there are several other reasons why AC compressors go bad.

Refrigerant leaks

Corrosion and damage to your AC can lead to refrigerant leaks that strain your AC compressor. As refrigerant circulates through your AC, it performs the essential job of cooling down the compressor. When refrigerant levels become too low, the compressor can overheat and burn out the motor. Refrigerants also carry oil that helps lubricate the compressor. Without it, the compressor is at risk of mechanical problems due to excessive friction.

Airflow problems

When your HVAC filters become dirty or clogged, they restrict airflow and can cause the AC compressor to overheat. This issue is especially common during wildfire season, when high levels of smoke and airborne contaminants clog Denver AC filters more quickly than under normal circumstances.

Electrical issues

The AC compressor is controlled by a series of delicate electrical components that can be damaged by power surges or gradual wear and tear. Electrical problems, such as faulty AC wiring, can lead to short cycling or compressor failure.

How Do You Know If Your AC Compressor Is Bad?

Keep an eye out for these common signs that your AC compressor is in trouble:

Loud or unusual noises, including grinding or squealing sounds
Inconsistent temperatures
AC blowing warm air
The outdoor unit is rattling or vibrating
AC regularly tripping the circuit breaker
Unexplained rising energy bills

If your energy bills are gradually rising even without an AC issue, it may be time to consider upgrading to an ENERGY STAR air conditioner. Energy-efficient systems help you cool your home more efficiently, so you can save on your utility bill.

Compressor Repair vs. Replacing the Entire AC Unit

The compressor is one of the largest and most fundamental components of your air conditioner, and it’s also one of the more significant parts to repair. Since compressor breakdowns are often costly to fix, it’s important to consider whether a compressor replacement or a full AC replacement is the best solution for your situation.

When compressor replacement makes sense

Replacing the compressor often makes sense if you have a relatively new air conditioning system that’s still under warranty. Depending on your warranty, you’ll likely still have to pay for labor, but the compressor should be covered under the manufacturer’s parts warranty.

Most equipment manufacturers require annual professional AC maintenance to uphold your AC system’s warranty, so it’s important to stay on top of your maintenance schedule.

When full AC replacement makes more sense

Most air conditioners have a life span of about 10 to 15 years. If your AC is more than 10 years old, or if the cost of a compressor replacement exceeds 50% of a new unit’s value, it usually makes more sense to invest in a new AC installation. One of our NATE-certified HVAC pros can talk to you about your cooling preferences and your budget to help you find the best air conditioner for your home.

How Denver’s Altitude Affects Compressor Lifespan

Denver’s high altitude puts significant strain on your air conditioner and can shorten the lifespan of your AC compressor. The high, thin air transfers heat less efficiently than air at lower altitudes, meaning your AC compressor has to work harder to cool your home. It’s also more prone to overheating and has to run longer to complete its cooling cycle. Regular professional AC maintenance can help offset these challenges and reduce the impacts of Denver’s altitude on compressor lifespan.

Contact Us for AC Compressor Failure in Denver

From routine AC maintenance to compressor repair and replacement, Sanders & Johnson is your go-to solution for local AC service. As a family-owned company with over 49 years of experience in Colorado homes, we’re committed to serving our neighbors in the Denver area with dependable home cooling solutions. We also offer financing options and same-day service for HVAC emergencies so you’ll never be stuck without support.

Frequently Asked Questions

What are the signs of AC compressor failure?

Common signs of a bad compressor on an AC unit include unusual noises like grinding and squealing, blowing warm air, short-cycling, and a shaking outdoor unit. Many of these signs are similar to those exhibited by other AC problems, so it can be difficult to know if your AC compressor is bad. Contact a licensed HVAC technician to inspect your air conditioner and determine the underlying issue.

How long does an AC compressor last?

A standard AC compressor typically lasts 10 to 15 years in the Denver climate. How long an AC compressor lasts in an AC unit also depends on how often you run your AC and your maintenance schedule. Regular preventative AC maintenance by a qualified pro can help extend the lifespan of your AC compressor.

When replacing an AC compressor, what else should be replaced?

When replacing an AC compressor, it’s also recommended to replace the accumulator, the expansion valve, and any O-rings or seals that are affected by the replacement process. A licensed HVAC technician can inspect your system and recommend what else should be replaced when you replace the AC compressor.

Can Denver’s altitude damage an AC compressor faster?

Yes, Denver’s altitude can damage an AC compressor faster. The high altitude forces your air conditioner to work longer and harder, leading to overheating and strain on the compressor.