Your refrigerator depends on many components that work together to keep food cold and safe to eat. Even a small part can cause major problems if it stops working. One example is the compressor start relay. This part is plugged into the side of the compressor and gives it the electrical boost it needs to begin running. If the start relay fails due to electrical damage or age, the compressor will not turn on, and the refrigerator will no longer stay cold.
Replacing a bad start relay is not complicated. Most homeowners can complete this task with a few basic tools and a little time. There is no need to call a repair technician for this fix. With the right guide and a compatible replacement part, you can restore your refrigerator’s cooling function quickly and safely.
Signs of a Bad Compressor Start Relay
If your refrigerator is not cooling, the start relay could be the problem. This part may wear out over time or stop working due to a power surge. Look for these signs:
- The compressor does not run. The start relay helps the compressor turn on. If you never hear the compressor’s usual hum, the relay might be the cause.
- The refrigerator is not cold. A failed relay means the compressor cannot turn on. As a result, both the refrigerator and freezer will begin to warm up.
- There are power issues when the compressor starts. If lights in the house flicker or fuses blow when the refrigerator runs, the relay may be drawing too much power because it is damaged.
- Clicking sounds come from the refrigerator. A damaged start relay may click repeatedly as it tries and fails to send power to the compressor. You may not hear the steady hum that normally follows.
- The relay rattles when you shake it. After you remove the relay, gently shake it. If it makes a rattling sound, it is likely broken and should be replaced.
- There is no electrical connection. You can test the relay using a multimeter. If there is no continuity between the terminals, the relay has failed.
What Causes a Compressor Start Relay to Fail?
Several conditions can lead to the failure of this small but important part. Understanding these causes can help you avoid future issues:
- Electrical surges from storms or power outages
- Overheating due to long compressor cycles
- Wear and tear from years of regular use
- Accumulation of dust or debris in the compressor compartment
- Poor-quality replacement parts from past repairs
- Manufacturing defects in the relay component
Tools You Will Need
This repair is simple if you prepare ahead of time. Gather these tools and materials before starting:
- A towel to place under the water line in case of drips
- ½-inch wrench to disconnect the water line
- Phillips screwdriver
- Flathead screwdriver
Tips Before You Start the Replacement
Before beginning the repair, a few simple precautions can make the process smoother and safer. These suggestions are helpful for first-time appliance repairs:
- Unplug the refrigerator to avoid an electrical shock
- Move the refrigerator away from the wall for better access
- Clear the area behind the fridge to prevent tripping
- Take a photo of the existing relay placement for reference
- Look up the part number for the correct replacement
- Wear gloves to protect your hands while handling parts
How to Replace the Compressor Start Relay on a Refrigerator
Here are the steps to safely replace the start relay, a part that helps your refrigerator’s compressor turn on and off properly.
Step 1: Prepare the Area
- Move the refrigerator away from the wall.
- Lay a towel under the water line to catch any water that might spill.
Step 2: Disconnect the Water Line
- Find the copper water line at the bottom of the refrigerator.
- Use a ½-inch wrench to loosen the nut and disconnect the line.
- Let any remaining water drain out.
Step 3: Remove the Rear Access Panel
- Locate the access panel at the bottom rear of the refrigerator.
- Use a Phillips screwdriver to remove the screws holding the panel in place.
- Set the panel and screws aside.
Step 4: Clean the Machine Compartment (Optional)
- Use a condenser brush, soft dry cloth, or vacuum to remove dust and debris.
- Avoid damaging small copper tubes or nearby components.
Step 5: Remove the Start Relay Cover
- Find the plastic cover on the left side of the compressor.
- Remove the screw with a Phillips screwdriver.
- Use a flathead screwdriver to release the locking tab, or press down on the cover and pull it off by hand.
Step 6: Remove the Old Relay
- Take note of wire positions before removal.
- Use a flathead screwdriver to disconnect the wires.
- Use the same screwdriver to pop the relay off its mounting pins and take it out.
Step 7: Install the New Relay
- Line up the new relay with the compressor pins and push it into place.
- Reconnect the wires in their original positions by hand.
Step 8: Reinstall the Relay Cover
- Insert the tabs on the back of the cover into place.
- Press the cover forward until it fits snugly.
- Reattach the screw using the Phillips screwdriver.
Step 9: Reattach the Access Panel
- Hook the locking tabs on the bottom of the panel into the body.
- Swing the panel up and secure it with the mounting screws.
Step 10: Reconnect the Water Line
- Hand-tighten the nut to reconnect the copper water line.
- Use the ½-inch wrench to finish tightening the connection.
Also Read: Top Freezer Refrigerator Compressor Run Capacitor Replacement Guide
Summing Up
Taking the time to replace a faulty compressor start relay can make a big difference in how your refrigerator works. If you’ve noticed cooling problems or unusual sounds, this simple repair might be all it needs. With a few tools, a little care, and some patience, you can get your fridge running again without the cost of a service call.
Just follow the steps, double-check the part you’re replacing, and take things one step at a time. Once you’re done, you can plug the fridge back in and check that the compressor kicks on. If it does, your repair was a success.