Compressor Replacement for LG or Kenmore Refrigerators: A Step-by-Step Guide

A faulty compressor is one of the most common reasons a refrigerator stops cooling. At American Appliance Repair, we specialize in LG and Kenmore refrigerators. If your fridge isn't cooling or making odd noises, a compressor replacement might be necessary. Here’s our complete step-by-step guide to how we professionally replace a compressor.

Step 1: Confirm the Compressor is the Issue

Before Compressor Replacement, our technicians perform a full diagnosis:

• Check temperature and airflow inside the fridge and freezer

• Inspect the condenser coils, evaporator fan, and start relay

• Measure compressor amperage and listen for clicking or humming

• Check refrigerant pressure (using gauges)

• Eliminate other possible issues (thermostat, control board, etc.)

Only after confirming compressor failure do we proceed with replacement.

Step 2: Safety First – Unplug and Prepare

• Unplug the refrigerator from power

• Move the unit to a well-ventilated workspace

• Wear safety goggles and gloves

• Recover refrigerant using a certified recovery machine (per EPA regulations)

Step 3: Remove the Old Compressor

• Locate the compressor (usually at the back, bottom of the fridge)

• Disconnect the power wires and overload relay

• Cut the refrigerant lines (suction and discharge) with a tubing cutter

• Remove the mounting bolts and take out the old compressor

• Plug all exposed tubes to prevent contamination

Step 4: Install the New Compressor

• Mount the new compressor using vibration-reducing rubber mounts

• Braze the new compressor to the suction and discharge lines using a torch and brazing rod

• Install a new filter drier (must be replaced during every compressor job)

• Ensure all connections are secure and leak-free

Step 5: Vacuum and Recharge the System

• Connect a vacuum pump to the system and vacuum for 30–60 minutes

• Check for vacuum stability to confirm no leaks

• Recharge the system with the exact type and amount of refrigerant (typically R-134a or R-600a, depending on model)

• Use a digital scale and manifold gauges for accuracy

Step 6: Test the Compressor and System

• Plug in the refrigerator and observe startup

• Verify the compressor is running quietly and smoothly

• Check for proper cooling in both compartments over the next 30–60 minutes

• Ensure there are no unusual noises, vibrations, or pressure issues

• Record pressure readings and refrigerant charge for warranty documentation

Step 7: Final Cleanup and Installation

• Clean up the work area

• Push the refrigerator back into place

• Reconnect the water line (if applicable)

• Provide the customer with a summary of the work and tips for care

• Register the compressor for warranty, if required by the manufacturer

Why Choose American Appliance Repair?

• Experienced in LG and Kenmore sealed system repairs

• EPA-certified technicians for refrigerant handling

• Honest, upfront pricing with warranty on parts and labor

• Fast service throughout the Houston area

Need Help with Your Refrigerator?

Call American Appliance Repair at 281-505-2800

We’ll get your fridge cooling again — fast and professionally.