How to Start Fridge Compressor Without Relay: A DIY Guide

Ever faced a situation where your refrigerator stops working and you realize it’s because of a faulty relay? Well, you’re not alone. This article is dedicated to helping you learn how to start fridge compressor without relay in simple terms and in a step-by-step manner.

Along the way, we’ll explore wiring your fridge compressor without a capacitor and fridge compressor direct start. So, we’re not only going to get your fridge back up and running but also help you understand a few more aspects of your fridge’s inner workings. Get ready for a deep dive into the world of fridge compressors!

How to Start Fridge Compressor Without Relay
Image Source: Makezine

Understanding the Fridge Compressor

Before we begin, it’s crucial you know what a fridge compressor is and what role the relay plays in your compressor.

What is a Fridge Compressor?

The fridge compressor, often compared to the heart of the refrigerator, plays a vital role in the cooling process. It’s responsible for pumping refrigerant through the fridge’s cooling system, enabling it to maintain a low temperature inside. When the compressor is running smoothly, you get that nice, cold environment that keeps your food fresh. But if it’s not…well, you get a big, heavy box that’s not much good for anything.

Role of Relay in Fridge Compressor

The relay, as it turns out, is the unsung hero in this cooling process. The relay in a fridge compressor serves as a gatekeeper of electrical power, controlling when the compressor should kick in or power down. When the thermostat senses a rise in temperature, it sends a signal to the relay. The relay then lets the power flow to the compressor, allowing it to do its job of cooling down your fridge. But, what if the relay stops working? What happens then?

Normal Operation of a Fridge Compressor Relay

When all’s well, the relay operates smoothly, channeling power to the compressor whenever needed. Imagine the relay as the conductor of an orchestra, cuing in the compressor at just the right moment to deliver a cooling performance. The relay ensures that the compressor only runs when it’s needed, conserving energy and prolonging the lifespan of your fridge.

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Complications When Relay Fails

But if the relay fails, it’s like the conductor has walked off the stage. There’s no one to cue the compressor, no matter how warm your fridge gets. This means your compressor won’t kick in to cool down the fridge. And that’s where our guide comes in handy!

Steps on How to Start Fridge Compressor Without Relay

Now, that we have a basic understanding of the compressor and the relay, let’s get to the heart of this article.

Safety Precautions Before Beginning

Before we jump into the nitty-gritty, let’s take a moment to discuss safety. Always, always disconnect the power before starting any work on your fridge. This isn’t just a ‘better safe than sorry’ thing – it’s a non-negotiable. You’ll also need some tools – a multimeter, a wire stripper, and some electrical tape should be enough for this job.

Disconnecting Power

We can’t stress this enough – always disconnect the power before doing any work on your fridge. It’s the first rule of working with any electrical device. Not only does it protect you from getting a nasty shock, but it also protects your fridge’s sensitive electronic components from potential damage.

Necessary Tools

So, you’ve disconnected the power. Good. Now, let’s talk tools. You’ll need a multimeter to test the electrical connections in your fridge. A wire stripper will be useful for any wires that need to be adjusted, and some electrical tape can secure those wires once you’re done. With these tools at the ready, you’re prepared to face almost any issue your fridge might throw at you.

Identifying the Compressor and Relay

The compressor is typically located at the back of your fridge, and it’s fairly easy to spot – it’s the large, dome-shaped metal object. The relay is typically attached to the side of the compressor and is usually a small box-like component. Once you’ve found these two components, you’re ready to dive into the process of starting your compressor without the relay.

How to Bypass the Relay

To bypass the relay, you’ll need to reroute the power that normally flows through it. Remember those wire strippers we talked about? You’re going to need them now. You’ll have to identify the wires connected to the relay, disconnect them, and then connect them in a way that allows the power to flow directly to the compressor.

Identify and Disconnect the Relay Wires

First, you’ll need to identify the wires that connect the relay to the compressor. They’re usually color-coded, but if they’re not, you may need to consult your fridge’s wiring diagram. Once you’ve identified them, use your wire stripper to disconnect the wires from the relay.

Bypassing the Relay Circuit

Now that you’ve disconnected the wires from the relay, you’re ready to bypass it. This involves connecting the wires you’ve just disconnected directly to the compressor. Use your electrical tape to secure the connection, ensuring that the wires are well insulated and safe to handle.

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Testing the Compressor Without the Relay

Once you’ve bypassed the relay, it’s time to test the compressor. This involves reconnecting the power and observing how the compressor reacts. But remember, be safe – always keep a safe distance when dealing with electrical appliances, and never touch the wires or the compressor while the power is on.

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Reconnect Power and Observe Operation

With the relay bypassed and the wires secured, you can now reconnect the power to your fridge. Keep an eye on the compressor. If everything has been done correctly, it should kick in and start working as usual. But what if it doesn’t?

Identify Potential Issues

If the compressor doesn’t start up, there could be several reasons why. It’s possible that there’s a fault in the wiring, or that the compressor itself is faulty. At this point, it might be a good idea to call in a professional. They’ll be able to diagnose and fix the issue in a safe and efficient manner.

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Fridge Compressor Wiring Without a Capacitor

Apart from the relay, another component that plays a crucial role in the operation of your fridge’s compressor is the capacitor. This little device stores electrical energy and releases it when the compressor needs a boost to get started. But, as with the relay, it’s possible to get the compressor running without it. Let’s look at how.

Role of Capacitor in Fridge Compressor

The capacitor in a fridge compressor is like a little energy reservoir. When the compressor needs to start up, it requires a lot of energy – more than can be supplied by the power line alone. That’s where the capacitor comes in. It releases the stored energy, giving the compressor the boost it needs to get started. But what happens when the capacitor fails?

Normal Operation of a Fridge Compressor Capacitor

When operating normally, the capacitor charges up when the compressor is off, storing energy for the next startup. Then, when the compressor needs to start, the capacitor releases this stored energy, giving the compressor the power boost it needs. This ensures a smooth and efficient operation of your fridge.

What Happens When the Capacitor Fails

If the capacitor fails, it can’t provide the power boost that the compressor needs to start. This can cause the compressor to struggle to start, or not start at all. And that’s where our guide comes in handy. We’ll show you how to get your compressor running even when the capacitor has called it quits.

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How to Wire the Compressor Without the Capacitor

Just as with the relay, bypassing a faulty capacitor involves rerouting the power that would normally flow through it. This is done by identifying the wires that connect the capacitor to the compressor, disconnecting them, and then connecting them in a way that allows the power to flow directly to the compressor.

Identifying the Capacitor Wires

The first step is to identify the wires that connect the capacitor to the compressor. They’re usually color-coded, but if they’re not, you may need to consult your fridge’s wiring diagram. Once you’ve identified them, use your wire stripper to disconnect the wires from the capacitor.

Bypassing the Capacitor Circuit

With the wires disconnected from the capacitor, you’re ready to bypass it. This involves connecting the wires you’ve just disconnected directly to the compressor. Again, use your electrical tape to secure the connection, ensuring that the wires are well insulated and safe to handle.

Testing the Compressor Without the Capacitor

Once you’ve bypassed the capacitor, it’s time to test the compressor. As before, this involves reconnecting the power and observing how the compressor reacts. But again, remember to always be safe when dealing with electrical appliances.

Reconnect Power and Observe Operation

With the capacitor bypassed and the wires secured, you can now reconnect the power to your fridge. Keep an eye on the compressor. If everything has been done correctly, it should start up and run as usual. But if it doesn’t?

Identify Potential Issues

As with the relay, if the compressor doesn’t start up, there could be several potential issues. It might be a fault in the wiring, or the compressor itself might be faulty. Again, at this point, it’s a good idea to call in a professional to diagnose and fix the issue.

Fridge Compressor Direct Start

Another method to get your fridge compressor up and running without a relay or a capacitor is the direct start. This process involves starting the compressor directly from the power source. Let’s take a look at how this is done.

What is a Direct Start?

A direct start is essentially starting the compressor without the assistance of a relay or a capacitor. It’s a bit like starting a car without the assistance of a starter motor – it can be done, but it requires a bit of know-how and a steady hand.

How to Perform a Direct Start on a Fridge Compressor

Performing a direct start on a fridge compressor involves applying power directly to the compressor’s motor. This is typically done by rerouting the power wires to bypass the relay and capacitor and connect directly to the compressor.

Preparation for Direct Start

Before performing a direct start, it’s important to disconnect the power and ensure you have the necessary tools on hand. You’ll also need to identify the correct wires, as you did when bypassing the relay and the capacitor.

Performing the Direct Start

To perform a direct start, connect the power wires directly to the compressor, bypassing the relay and capacitor. Then, reconnect the power and observe the compressor. If everything has been done correctly, it should start up and run as usual.

Testing the Compressor After Direct Start

As with the previous methods, testing the compressor after a direct start involves reconnecting the power and observing the compressor’s operation. Always remember to be safe when dealing with electrical appliances, and never touch the wires or the compressor while the power is on.

Reconnect Power and Observe Operation

After performing a direct start, reconnect the power and observe the compressor. If it starts up and runs as usual, you’ve successfully performed a direct start. But if it doesn’t?

Identify Potential Issues

If the compressor doesn’t start after a direct start, there could be several potential issues. It might be a fault in the wiring, or the compressor itself might be faulty. Again, at this point, it’s a good idea to call in a professional to diagnose and fix the issue.