How to Replace Dryer Cord | Swap a 4-Prong or 3-Prong Cord Safely

Replacing a dryer cord takes about 30 minutes: unplug the dryer, open the access panel, move the three wires to the new cord’s terminal block, and reattach the strain relief.

For the full breakdown, see our best Blow Dryer With Retractable Cord guide.

A dryer cord swap is one of the easier appliance repairs a homeowner can make, and the process is nearly identical whether you’re moving from a 3-prong to a 4-prong cord or just replacing a damaged one. What actually requires your attention is choosing a cord that matches the wall receptacle. The safest, current standard for new 240V dryer circuits is a 4-wire setup, but many older homes still have the 3-slot receptacles that need a matching 3-prong cord. Maytag’s own guidance confirms the swap comes down to the same few steps.

Choose the Right Cord: 3-Prong vs 4-Prong

The plug you need is decided by the outlet, never by the dryer. A 4-prong cord connects to a 4-slot receptacle (NEMA 14-30R), and a 3-prong cord fits a 3-slot receptacle (NEMA 10-30R) found in older installations. The Fine Homebuilding breakdown of the two standards is blunt: a 4-prong cord on a 3-wire circuit — or the reverse — is unsafe and noncompliant.

That safety difference comes down to grounding. In the newer 4-wire standard, the neutral and ground are separate conductors. On a 3-wire setup, the neutral doubles as the ground, which is why electricians and manufacturers describe the 4-wire arrangement as the safer option for new circuits or when you can upgrade the receptacle wiring.

• 4-prong cord: for a 4-slot outlet (NEMA 14-30R) — the current code standard for new dryer circuits.
• 3-prong cord: for a 3-slot outlet (NEMA 10-30R) — legacy installations only, where local code still permits it.

Wire Colors and Terminal Block Order

Every dryer terminal block follows the same three-position layout, and the wire order is the part you cannot get wrong. The center terminal always takes the white neutral wire. The two outer terminals take the black and red hot wires — their left/right order doesn’t matter electrically, since 240V dryers treat both hots identically. The green or bare copper wire is the equipment ground, and it connects to the green grounding screw on the dryer chassis instead of the terminal block.

On dryers that came from the factory with a 3-prong cord, you may find a grounding strap or jumper linking the neutral center terminal to the chassis. When you install a 4-prong cord, that strap must be removed so neutral and ground stay separate. Leaving it in place creates a parallel path that the current code forbids.

Step-by-Step Dryer Cord Replacement

This procedure matches the sequence Lowes’ installation sheet and Maytag’s how-to guidance describe for electric dryers.

1. Unplug the dryer from the wall and shut off the breaker at the panel. Confirm power is off before touching anything.
2. Remove the rear access panel — usually four screws holding the cover over the terminal block, near the top or middle of the back.
3. Loosen the strain relief — the clamp where the cord enters the dryer — so the old cord slides free.
4. Disconnect the old cord’s wires at the terminal block, noting where each one sat. Keep the screws safe; you’ll reuse them.
5. Feed the new cord’s wires through the strain relief, leaving enough slack to reach the terminals.
6. Connect the green or bare wire to the green grounding screw/port, the white wire to the center neutral terminal, and black and red to the two outer hot terminals. Tighten each screw firmly. A loose connection is the classic cause of a burnt terminal.
7. Retighten the strain relief so the cord can’t be pulled out of the dryer, then replace the access panel.
8. Plug in and test — run a short heat cycle and confirm the dryer heats before pushing it back into place.

If you’re looking for a matching cord to finish the job, Maytag’s overview of dryer plug types is a useful reference for confirming your receptacle before buying.

Common Mistakes and Safety Checks

The mistakes that show up in most failed installs are easy to avoid. Forgetting to unplug the dryer or shut off the breaker is the dangerous one — never skip it, even for a “quick” look. A loose strain relief leaves the cord able to pull on the terminal block, and a reversed ground or neutral connection can energize the dryer chassis. If your dryer had a grounding strap for a 3-prong cord and you’re installing a 4-prong cord, removing that strap is non-negotiable. And before you buy anything, confirm your receptacle is actually 3-slot or 4-slot — a cord that doesn’t match the outlet is unsafe, and adapters that defeat the grounding are not a workaround.

Gas dryers that plug into a standard 120V outlet don’t need this procedure — the 240V cord swap applies to electric dryers. If the access panel reveals wiring that doesn’t match the simple three-terminal layout above, stop and call an appliance tech rather than guessing. The same advice applies if the old cord shows scorch marks or the terminal block looks melted — that’s a sign of a loose connection that should be inspected before the new cord goes on.