Refrigerator Compressor Replacement: Diagnose and When to Call a Pro

The compressor is the workhorse of the refrigerator. It helps move refrigerant through the appliance’s closed cooling system and facilitates the release of heat to ensure the fridge can maintain a cold temperature. Without a functioning compressor, your fridge is out of commission.

Of course, there are other possible causes of refrigerator breakdowns. This article will help you identify a malfunctioning compressor as the source of your refrigerator trouble and walk you through the next steps. 

What a Refrigerator Compressor Does

To understand why a refrigerator compressor is such an integral component, it helps to understand how a refrigerator works at its most fundamental level.

Refrigerators generate a cooling effect by cycling refrigerant through a closed loop. A compressor, as the name implies, compresses refrigerant gas to increase its pressure and temperature. As this hot, pressurized gas moves through the system, condenser coils at the rear of the fridge allow it to give off heat into the surrounding room. This is why it often feels warm behind the fridge.

As the gas cools, it transforms into a high-pressure liquid. The liquid refrigerant passes through an expansion valve, facilitating a swift drop in pressure and temperature. Now quite cold, the liquid travels through the evaporator coils and turns into a gas that can absorb the heat from within the fridge. This gas travels back to the compressor, where the cycle repeats.

Here is one way to think of it. Refrigerators don’t create the cold, but they do create a cooling effect by extracting the heat from the food and air within the fridge. The compressor is an essential piece to this feat of engineering. It is the component responsible for pressurizing the refrigerant gas and pumping it through the sealed system. 

Common Signs of Compressor Failure

Faulty refrigerator compressors may present a number of problems. Be aware, however, that these problems don’t guarantee that the compressor is the problem. Other faulty components or even just dusty condenser coils can present similar symptoms.

• Ineffective or inconsistent cooling.

If you have a refrigerator not cooling, compressor problems are a possibility. The compressor is integral to the cooling action of the refrigerator. If it’s not adequately pressurizing refrigerant to pump it through the refrigeration system, the fridge temp may run too high or fluctuate, or there may be no cooling at all.

• Constant running.

The compressor doesn’t run constantly in a properly functioning refrigerator. The average fridge runs a cooling cycle for around 20 to 40 minutes before shutting off for roughly the same amount of time. If the compressor is running constantly, the refrigerator is struggling to maintain temperature, and the compressor may be faulty.

• Unusual noises.

All refrigerators make noise, and you’re probably used to the quiet hum in the background of your house when the refrigerator is in the middle of a cooling cycle. Odd noises that catch your attention are often cause for concern. Buzzing, rattling, whining, and knocking could point to compressor failure.

• Temperature swings.

A compressor that isn’t cycling properly can cause the fridge temperature to bounce up and down. You might find frost or partially frozen food one day and melted ice or thawed food in the freezer the next.

• Short cycling.

Short cycling is when an appliance turns on and off too frequently. You might hear your refrigerator’s compressor engage, only for it to shut off a few moments later. 

• Cooling cycles not triggering.

If the fridge appears to be drawing power (based on the interior bulb or any indicator lights, for example) but isn’t running, the compressor may need to be replaced.

• High external temperatures.

It’s normal for the rear of the fridge to feel warm, since the condenser coils are designed to give off heat. If the fridge feels unusually hot, however, the compressor may be overheating due to a mechanical or electrical failure. 

Refrigerator Compressor Replacement Cost Breakdown

Refrigerator repairs tend to be costly when the sealed system is involved. The cost of repairing or replacing a fridge compressor ranges from around $500 to $1,500. Here’s how that total breaks down:

• Parts: $200–$600
• Labor: $300–$900+

Labor is the primary contributor to the high cost of repair because working on a refrigerator’s sealed system is specialized work. It involves handling potentially hazardous refrigerants, which requires EPA certification and in some cases additional state licensing. 

Additional factors that can drive up the costs include:

• Refrigerator make and model, with high-end appliances costing more to repair
• Appliance age and parts availability
• Local cost of living
• Diagnostic or service fees
• Ease of access
• Additional component repairs or replacements, such as a new capacitor or start relay
• Refrigerant recharge or replacement

Refrigerator Repair vs. Replacement: When It’s Better to Replace the Refrigerator

Determining when to replace refrigerator compressor units or just get a new fridge entirely is sometimes a difficult question. Here are some factors to weigh.

• Appliance age. If your refrigerator is approaching the end of its lifespan, it probably isn’t worth the cost to replace the compressor. You may be lucky to get another couple of years out of it before something else breaks down. 
  
  The average fridge probably isn’t worth repairing if it’s more than 10 years old, but consider how refrigerator lifespans can vary by brand. If you have a high-end fridge that should last for 15 years or more, a repair at the 10-year mark may still be reasonable.
   
• Make and model. It’s not always worth replacing the compressor on a basic, affordably priced refrigerator because the cost of repair can be more than 50% of the fridge’s overall value. It’s more economical to put that money toward a new fridge. 
   
• Overall condition. An appliance in otherwise excellent condition may be worth saving with a new compressor. But if the condenser coils, evaporator coils, interior, or other parts are in a state of disrepair, you run the risk of another breakdown sooner rather than later. It’s better to invest in a new machine. 
   
• Quoted cost of repair. As a rule of thumb, the cost of repair should not exceed half of the appliance’s value. Have a trustworthy professional give you a repair quote. Weigh the cost against the fridge’s estimated value before committing to the repair.

How a Home Warranty Can Reduce Repair Costs

There are some circumstances in which homeowners may be able to shield themselves from the high cost of refrigerator repair. One scenario is if the refrigerator is still protected by the manufacturer’s warranty. Many refrigerator manufacturers offer one- to three-year warranties that cover both parts and labor in the event of an appliance breakdown. Extended warranties are also common, in which the manufacturer will perhaps cover parts, but not labor, for a period of five to ten years after purchase.

Another way to minimize out-of-pocket expenses is to maintain equipment breakdown coverage from a third-party provider after the manufacturer’s warranty expires. Appliance repair from a third party typically entails a service fee and may have coverage caps, but the homeowner is protected from the full cost of repair or replacement.