What You Need to Know Before Starting
A dryer cord replacement is a job you can do yourself if your dryer uses a standard three-prong or four-prong plug — it takes about 30 minutes and costs $15 to $40 for the cord itself. The hardest part is not the wiring; it is making sure you have the right cord for your dryer model and that the power is completely off before you touch anything inside.
The cord connects to terminal blocks inside the dryer cabinet, and those blocks hold the power that runs your dryer. If you touch a live terminal, you will get a serious shock. This is why the first step is always to unplug the dryer or turn off the breaker — and then check that it is actually off by trying to start the machine.
Most dryers sold in North America use either a three-prong cord (older models, 120/240 volts) or a four-prong cord (newer models, 240 volts only). Your old cord will tell you which one you need. If you are not sure, look at the plug on the back of your dryer or check your owner's manual.
Key Takeaways
- Turn off the breaker to your dryer and unplug it, then test that power is off by trying to start the machine before you open the cabinet.
- Take a photo of how the wires connect to the terminal blocks inside before you disconnect anything, so you know where each wire goes back.
- Buy a replacement cord that matches your dryer's voltage and plug type — three-prong for older dryers, four-prong for newer ones.
- The job involves loosening two or three terminal screws, sliding the old cord out, and sliding the new one in — no soldering or special tools needed.
- After you reconnect the wires, test the dryer on low heat for a few minutes before you load it with clothes.
Gather Your Tools and Materials
You will need a replacement dryer cord (the correct type for your model), a screwdriver (usually a Phillips head, sometimes a flathead), and a flashlight or phone light to see inside the cabinet. Some dryers have a metal strain relief clamp around the cord where it enters the cabinet — if yours does, you will need a wrench or pliers to loosen it, but many newer dryers do not have one.
Before you buy the cord, look at the plug on the back of your current dryer. A three-prong plug has two flat prongs and one round prong. A four-prong plug has three flat prongs and one round prong. The cord itself is usually labeled with the voltage (120/240V or 240V) and amperage (typically 30 or 40 amps). Write down what you see or take a photo, then buy an exact match at any hardware store or online.
Do not assume all dryer cords are the same. A cord rated for 30 amps will not safely handle a 40-amp dryer, and using the wrong plug type can damage your dryer or create a fire hazard.
Turn Off Power and Confirm It Is Off
Locate your home's electrical panel and find the breaker labeled for the dryer — it is usually a double breaker (two switches together) rated for 30 or 40 amps. Switch it to the OFF position. If your dryer is plugged into an outlet, unplug it as well.
Now test that the power is actually off. Plug in a lamp or phone charger into the outlet where your dryer was plugged in, or try to start the dryer by pressing the start button. If nothing happens, the power is off. If the lamp turns on or the dryer starts, go back to the panel and flip the correct breaker.
This step is not optional. Touching a live terminal inside a dryer can cause a serious or fatal shock. Take the 30 seconds to confirm the power is off.
Open the Cabinet and Locate the Terminal Block
Most dryers have an access panel on the back held on by four or five screws. Remove those screws and set them aside where you will not lose them. Slide or lift the panel away — it may be tight, so do not force it.
Inside, you will see the terminal block, which looks like a small plastic or ceramic block with three or four metal screws sticking out of it. The dryer cord wires connect to these screws. Before you touch anything, take a photo of how the wires are connected — which wire color goes to which screw. This photo is your map for putting the new cord in correctly.
If your dryer has a strain relief clamp (a metal ring around the cord where it enters the cabinet), loosen the screw or bolt on that clamp so you can slide the old cord out.
Disconnect the Old Cord and Install the New One
Using your screwdriver, loosen the terminal screws one at a time. As each screw loosens, the wire will come free. Pull the old cord out of the cabinet and away from the dryer.
Slide the new cord into the cabinet through the same opening where the old one came out. If there is a strain relief clamp, feed the cord through it first, then position the clamp so it holds the cord snugly — not so tight that you crush the cord, but tight enough that it does not move.
Now connect each wire to its terminal screw. Use your photo to match the wire colors: the black wire goes to one screw, the red wire to another, and the white (neutral) wire to the third. On a four-prong cord, the green or bare copper wire (ground) goes to the fourth screw. Tighten each screw firmly — the wire should not pull free if you tug on it — but do not over-tighten, which can crack the terminal block.
find the Cord and Test the Dryer
If your dryer has a strain relief clamp, tighten the screw or bolt on it so the cord is held in place. Slide the access panel back on and replace all the screws.
Plug the dryer back in or switch the breaker back to ON. Press the start button to make sure the dryer turns on. Let it run on low heat for 3 to 5 minutes, then stop it and feel the cord where it enters the cabinet. The cord should be warm but not hot — if it is too hot to touch, turn off the dryer when ready, turn off the breaker, and check that all terminal connections are tight.
If the dryer runs normally and the cord stays cool, you are done. Load it with a small test load of damp clothes and run a full cycle to confirm everything works.
Common Mistakes to Avoid
The most common error is connecting the wires to the wrong terminals. This is why taking a photo before you disconnect anything is so important — it takes 10 seconds and saves you from having to open the dryer again. If you do mix up the wires, the dryer will not work, or it may work but the heating element will not turn on.
Another mistake is buying the wrong cord type. A three-prong cord will not fit a four-prong outlet, and forcing it can damage both the cord and the dryer. Always match the plug type and voltage rating exactly.
Do not skip the power-off test. Touching a terminal while power is on is dangerous and can be fatal. If you are not confident that the power is off, call a licensed electrician.
Frequently Asked Questions
What is the difference between a three-prong and four-prong dryer cord?
A three-prong cord has two hot wires and one neutral wire, and is used on older dryers that also have a gas option. A four-prong cord has two hot wires, one neutral wire, and one ground wire, and is standard on newer electric dryers. The plug shapes are different, so you cannot mix them up — a three-prong plug will not fit a four-prong outlet.
Can I use an extension cord with my dryer?
No. Dryer cords carry high current (30 to 40 amps), and extension cords are not rated for that load. Using an extension cord creates a fire hazard. The dryer must be plugged directly into a dedicated outlet.
How do I know if my dryer cord is bad?
Signs include the dryer not turning on, the heating element not working, a burning smell near the outlet or the back of the dryer, or visible damage to the cord or plug (cracks, melting, scorch marks). If you see any of these, stop using the dryer and replace the cord.
Do I need a licensed electrician to replace a dryer cord?
No, but some areas require a licensed electrician to do any work inside an appliance. Check your local building codes or call your city's building department. If you are not comfortable working with electrical connections, hiring an electrician is a safe choice — the job usually costs $100 to $200 in labor.
What if the terminal block is cracked or damaged?
If the block itself is cracked or the screws spin without tightening, the terminal block needs to be replaced, not just the cord. This is a more involved repair that usually requires a technician. Do not try to force a connection into a damaged block.