Whirlpool Refrigerator Relay Switch – Restore Your Fridge’S Cool &

Ever opened your refrigerator only to find it’s not as cold as it should be, or worse, completely warm? That sinking feeling is all too familiar for homeowners. Before you panic and call an expensive appliance repair technician, consider that the problem might be a small but mighty component: the start relay.

This unsung hero plays a critical role in your refrigerator’s cooling system, specifically in getting the compressor up and running. If it fails, your fridge stops cooling, food spoils, and your wallet takes a hit. But here’s the good news: diagnosing and replacing a faulty start relay on a Whirlpool refrigerator is a task many DIYers can tackle.

At The Jim BoSlice Workshop, we believe in empowering you to fix things around your home with confidence and competence. This comprehensive guide will walk you through everything you need to know about your Whirlpool refrigerator’s relay switch, from understanding its function to safely testing and replacing it. Let’s get that fridge humming again!

Understanding the Role of Your Refrigerator’s Start Relay

The compressor is the heart of your refrigerator’s cooling system, circulating refrigerant to keep things chilly. But like any motor, it needs a little help to get going. That’s where the start relay comes in.

It’s a small electrical component, typically found attached to the side of the compressor. Its primary job is to provide a brief surge of power to the compressor’s start winding, giving it the initial kick it needs to begin its cooling cycle.

Once the compressor is running, the relay disengages, allowing the compressor to operate efficiently. Without a properly functioning start relay, your compressor simply won’t start, or it will try and fail, often resulting in an audible clicking sound.

What is a PTC Relay?

Many modern refrigerators, including Whirlpool models, use a type of start relay known as a Positive Temperature Coefficient (PTC) relay. This small, often black, plastic component contains a ceramic disc.

When power is applied, the disc’s resistance rapidly increases as it heats up. This change in resistance helps provide the initial jolt to the compressor’s start winding, then quickly removes itself from the circuit once the compressor is running. It’s a clever, self-regulating design.

Common Signs of a Failing Whirlpool Refrigerator Relay Switch

Identifying the symptoms of a bad start relay is crucial for proper diagnosis. Don’t jump to conclusions that your compressor is dead just yet. A failing relay often mimics more serious problems.

Keep an eye (and ear) out for these tell-tale signs:

• Refrigerator Not Cooling: This is the most obvious symptom. If your fridge isn’t getting cold, but the interior light still works, the compressor might not be running.
• Clicking Sound Every Few Minutes: This is a classic indicator. The clicking sound is usually the thermal overload protector (TOP) trying to engage and disengage the compressor because the start relay isn’t doing its job.
• Compressor Not Running (or runs for a short time then stops): You might hear a hum from the compressor area, but it never fully kicks on, or it starts, runs for a minute or two, then shuts off.
• Fridge is Warm, Freezer is Cold: Sometimes, a struggling compressor due to a bad relay can lead to uneven cooling. However, this is less common for just the start relay.
• No Compressor Noise at All: If there’s no hum or vibration from the compressor when it should be running, and the fridge isn’t cooling, the relay is a prime suspect.

If you observe any of these symptoms, it’s time to investigate your Whirlpool refrigerator relay switch.

Safety First: Essential Precautions Before You Start

Working with any appliance, especially one connected to your home’s electrical system, requires strict adherence to safety protocols. Your safety, and the longevity of your appliance, depend on it.

Always prioritize these steps:

1. Unplug the Refrigerator: This is paramount. Locate the power cord and pull it directly from the wall outlet. Do not simply turn off the fridge at its control panel.
2. Wear Protective Gear: Safety glasses or goggles are a must to protect your eyes from dust or unexpected debris. Work gloves can protect your hands from sharp edges.
3. Clear Your Workspace: Ensure you have enough room to work comfortably behind or beside the refrigerator. Remove any obstructions.
4. Have a Helper (Optional but Recommended): Moving a heavy refrigerator can be tough. Having another person to help pull it out or stabilize it makes the job safer and easier.
5. Understand Electrical Components: If you’re unsure about any electrical component or wiring, stop and consult a professional. Don’t guess with electricity.

Tools and Materials You’ll Need

Before you dive into the repair, gather all your tools and the necessary replacement part. Being prepared saves time and frustration.

Here’s a list of what you’ll likely need:

• New Start Relay: This is the most important part. Ensure you get the correct model-specific replacement for your Whirlpool refrigerator. Check your fridge’s model number, usually found inside the fridge compartment.
• Screwdrivers: Phillips head and flathead, for removing access panels.
• Needle-Nose Pliers: Useful for gently disconnecting wires.
• Multimeter (Optional but Recommended): For testing the old relay (we’ll cover this).
• Work Gloves: To protect your hands.
• Safety Glasses: To protect your eyes.
• Flashlight or Headlamp: For better visibility in the cramped compressor area.
• Appliance Dolly (Optional): If you need to move the fridge a significant distance.

Step-by-Step Guide: Locating and Replacing the Start Relay

This is where the rubber meets the road. Follow these steps carefully to replace your refrigerator’s start relay.

Step 1: Disconnect Power and Access the Compressor

First things first: unplug the refrigerator from the wall outlet. This cannot be stressed enough. Once unplugged, carefully pull the refrigerator away from the wall to access the back panel.

Most Whirlpool refrigerators have an access panel at the bottom rear. You’ll typically need a Phillips head screwdriver or a 1/4-inch nut driver to remove the screws holding this panel in place. Once the screws are out, carefully remove the panel and set it aside.

Step 2: Identify the Start Relay and Thermal Overload Protector (TOP)

With the access panel removed, you’ll see the compressor – a large, black, usually spherical or cylindrical tank. Attached to the side of the compressor, often near the bottom, you’ll find a small plastic or metal housing. This is where the start relay and thermal overload protector (TOP) are located.

The start relay is usually a small, black plastic box, often with three terminals connecting to the compressor pins. The TOP is usually a smaller, disc-shaped component that sits right next to or on top of the relay, also connected to the compressor pins. They often come as a combined unit.

Step 3: Disconnect the Wiring

Before removing the relay, take a clear photo of the wiring configuration with your phone. This will be invaluable when reconnecting the new relay.

Gently but firmly pull the wires connected to the relay. They usually have spade connectors that slide off. Use needle-nose pliers if they are stubborn, but be careful not to pull on the wires themselves, only the connectors. Note which wire goes to which terminal if they are not color-coded or unique.

Step 4: Remove the Old Start Relay

The start relay is typically held onto the compressor pins by friction. Carefully wiggle and pull the relay straight off the pins. It might be snug, but it should slide off.

Sometimes, a metal spring clip holds it in place; if so, gently pry it open or slide it off. Inspect the compressor pins for any damage or corrosion.

Step 5: Test the Old Relay (Optional but Recommended)

If you have a multimeter, you can test the old start relay to confirm it’s faulty. For a PTC relay:

• Shake Test: Gently shake the relay. If you hear rattling, the internal ceramic disc is likely broken, indicating a bad relay.
• Resistance Test: Set your multimeter to measure ohms (Ω). Place the probes on the two main terminals where the compressor pins insert. You should get a low resistance reading (e.g., 0.5 to 10 ohms). If you get an open circuit (OL or infinity), the relay is bad. For other types of relays, consult your service manual for specific resistance values.

Even if you don’t test it, if you’re experiencing the symptoms described earlier, replacing it is a reasonable next step.

Step 6: Install the New Start Relay

Take your new Whirlpool refrigerator relay switch. Line up the pins on the compressor with the holes on the relay. Carefully push the new relay firmly onto the compressor pins until it clicks or sits securely. Ensure it’s fully seated.

Step 7: Reconnect the Wiring

Refer to the photo you took in Step 3. Connect the wires back to their respective terminals on the new relay. Ensure all connections are snug and secure. Loose connections can cause further issues or even safety hazards.

Step 8: Reassemble and Test

Replace the access panel on the back of the refrigerator, securing it with the screws you removed earlier. Carefully push the refrigerator back into its original position, ensuring it’s level and not pinching any wires or water lines.

Finally, plug the refrigerator back into the wall outlet. Listen for the compressor to start running and feel for vibrations. Give the refrigerator several hours to cool down completely. Check the internal temperature to confirm proper operation.

Troubleshooting Common Issues After Relay Replacement

Even with a careful replacement, sometimes things don’t go perfectly. Here are a few common issues and how to troubleshoot them:

• Refrigerator Still Not Cooling: Double-check all wiring connections. Ensure the new relay is fully seated on the compressor pins. If the problem persists, the issue might be with another component, such as the compressor itself, the thermostat, or the defrost timer.
• Clicking Noise Returns: This could indicate a poor connection, a faulty new relay (rare, but possible), or that the compressor itself is truly failing and drawing too much current, causing the thermal overload protector to trip.
• No Power to Fridge: Ensure the refrigerator is fully plugged in and the circuit breaker hasn’t tripped. Check for any pinched wires.

If you’ve followed all steps and are still experiencing problems, it might be time to call a qualified appliance technician. Sometimes, the problem is indeed more complex than a simple relay swap.

Maintaining Your Refrigerator for Longevity

While replacing a whirlpool refrigerator relay switch is a specific repair, general maintenance can prevent future issues and extend the life of your appliance.

Here are some pro tips:

• Clean Condenser Coils Regularly: Dust and debris on the condenser coils force your compressor to work harder, increasing the risk of component failure, including the relay. Clean them with a vacuum cleaner attachment and a coil brush every 6-12 months.
• Ensure Proper Airflow: Don’t push your refrigerator flush against the wall. Leave a few inches of space for air circulation around the coils and compressor.
• Check Door Gaskets: Worn or damaged door gaskets allow cold air to escape, making the compressor run more frequently and stress its components.
• Avoid Overloading: Don’t pack your refrigerator so full that air can’t circulate. This also makes the compressor work harder.

Frequently Asked Questions About Whirlpool Refrigerator Relay Switches

What does a refrigerator relay switch do?

A refrigerator relay switch, specifically the start relay, provides a temporary boost of power to the compressor’s start winding, helping it overcome initial inertia and begin its cooling cycle. Once the compressor is running, the relay disengages.

How do I know if my Whirlpool refrigerator relay switch is bad?

Common signs include the refrigerator not cooling, the compressor making a clicking sound every few minutes but not starting, or the compressor running for only short periods before shutting off. A rattling sound when you shake the relay also indicates failure.

Can I replace the start relay myself?

Yes, replacing a Whirlpool refrigerator relay switch is a common DIY repair. It involves disconnecting power, removing an access panel, detaching wires, and pulling the old relay off the compressor pins before installing the new one. Always prioritize safety and ensure you have the correct replacement part.

Where is the start relay located on a Whirlpool refrigerator?

The start relay is typically located on the side of the compressor, which is a large, black, often spherical or cylindrical component found at the bottom rear of your refrigerator, behind an access panel.

Do all refrigerators use the same type of start relay?

No, different refrigerator models and brands use various types of start relays, though PTC relays are very common in modern appliances. It’s crucial to purchase a replacement relay that is specifically designed for your Whirlpool refrigerator’s model number to ensure compatibility and proper function.

Bringing It All Together

Tackling a refrigerator repair, especially one involving the compressor’s electrical components, might seem daunting at first. However, understanding the function of the Whirlpool refrigerator relay switch and following a methodical, safety-conscious approach can make this a highly rewarding DIY project.

You’ve learned how to identify the symptoms of a failing relay, gather the right tools, and execute a step-by-step replacement. Remember, patience and attention to detail are your best allies in any home improvement task. By successfully replacing this small but vital part, you’re not only saving money but also gaining valuable experience and confidence in your DIY skills. So go ahead, get that fridge running like new again, and enjoy the satisfaction of a job well done!

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Jim Boslice

Jim Boslice is a power tool enthusiast who tests, reviews, and shares practical guides to help DIYers and professionals choose the right tools for every project.

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