How To Replace Refrigerator Compressor: Easy Fix

How To Replace Refrigerator Compressor: Easy Fix

Is your refrigerator difficult to maintain the cool temperature or is it producing weird sounds? This is an indicator that it is high time to change the compressor. It may seem like a very difficult task to perform but replacing a compressor is actually quite simple if one has the right tools and instructions to follow. Here is a detailed guide on how to replace your refrigerator compressor in the most effective and safe manner. Avoid a fault compressor ruining the contents of your refrigerator. Let us repair your refrigerator today.

Signs You Need to Replace Your Refrigerator Compressor

There are several signs that can be used to diagnose a faulty compressor you need to know.

1. The Refrigerator Isn’t Cooling

If the fridge and freezer are warm but the light and fan are on, then the cooling system is likely to be faulty. A failing compressor means the refrigerator compressor cannot circulate, which leads to a lack of cooling.

2. Clicking or Humming Sounds

A sound that is produced every few minutes or a low humming sound that is produced from the back of the fridge is a sign that the compressor is trying to start but is unable to do so.

3. Compressor Runs Constantly or Not at All

Another sign that something is wrong is if the refrigerator compressor is either constantly running or not running at all. It may have internal mechanical failure or electrical issues.

4. Tripped Circuit Breaker

Compressor problems can lead to electrical shorts, which can result in frequent tripping of your home circuit breaker.

5. Overheating Compressor

Touch the compressor's surface in the refrigerator's back. If it is extremely hot even when the unit is not cooling, then it could be a sign of internal damage.

Steps to Replace a Refrigerator Compressor

Replacing a refrigerator compressor is a more complex task and includes the handling of refrigerant and electrical parts. 

Step 1: Diagnose the Compressor

To ensure that the refrigerator compressor is the problem before replacing it, follow the following steps. 

• Use a multimeter to check the resistance between the terminals of the compressor.

• Normal readings should show low resistance between terminal pairs.

• The compressor can be broken if there is no continuity or if the readings are incorrect.

• Also, check the start relay and overload protector which are low cost parts that are most likely to develop problems first.

Step 2: Disconnect Power and Access the Compressor

Always start with safety. Turn off the power supply of the fridge and then unfasten the panel to get to the compressor.

• Switch off the refrigerator by pulling the plug out of the socket.

• Take the unit to a well-ventilated area with good lighting.

• To gain access to the compressor, the rear lower panel must be taken off.

• Find the compressor, which is typically a black cylindrical part located at the bottom rear of the unit.

Step 3: Safely Remove the Refrigerant

Use certified recovery equipment to properly extract and store the refrigerant, following environmental and safety regulations.

• Make that the system's service valve is attached to the refrigerant recovery equipment.

• Consult EPA or local guidelines for the correct way of recovery and disposal.

• Ensure that all the pressure in the system is released before proceeding with the next step.

• Never release refrigerant to the atmosphere as it is toxic and prohibited in most areas.

Step 4: Remove the Faulty Compressor

When the system is depressurized, it is time to start removing the faulty refrigerator compressor. 

• All the electrical wires from the compressor should be disconnected and labeled.

• The refrigerant lines can be cut or unsoldered using a pipe cutter or a torch.

• Remove the bolts that hold the compressor to the mounting base.

• Gently and safely take off the compressor from the refrigerator.

Step 5: Install the New Compressor

 Secure the new compressor in place, connect all tubing and electrical wires, and ensure proper alignment with the system.

• Position the new compressor in the same location and tighten the bolts properly.

• Reconnect the refrigerant lines then use braze or solder to seal all the joints.

• Replace the filter-drier to avoid future contamination or moisture in the compressor.

• Reconnect all the wires according to the labels or the manufacturer’s diagram.

Step 6: Evacuate and Recharge the System

Use a vacuum pump to remove air and moisture, then recharge the system with the correct type and amount of refrigerant.

• Connect a vacuum pump and evacuate the system for 30 to 45 minutes.

• Use a leak detector or apply soap water on the joints to check for leaks.

• Refill the system with the right type and quantity of refrigerant.

• The refrigerator should be installed according to the guidelines provided on the data label of the refrigerator.

Step 7: Power On and Test

Plug in the refrigerator and ensure the compressor runs smoothly and the unit begins cooling properly.

• Plug the refrigerator back in and let the compressor start up.

• Look out for any unusual noises, shake or heat emanating from the car engine.

• Check the internal temperature after the next few hours.

• Check that the compressor is turning on and off as required.

Replacing a refrigerator compressor may seem like an intimidating task, but with the right tools, knowledge, and a careful approach, it’s a manageable repair that can save you a significant amount of money compared to purchasing a new fridge. By following the steps outlined in this guide diagnosing the issue, safely removing the old compressor, and installing a new one you can restore your refrigerator’s cooling ability and extend its lifespan.

Written by Allen Rode for HnKParts, a trusted provider of high-quality appliance parts, offering a wide range of replacement components for refrigerator compressor, Dishwashers, and more.