If your curling iron is not heating up, the most likely cause is a loose electrical connection, a tripped safety feature, or a worn-out heating element. Before you buy a replacement, check the power cord for damage, the outlet for power, and the iron’s temperature dial or reset button. Many curling irons have an automatic shutoff feature that can be reset, and a simple plug test can rule out a dead outlet. Here is a step-by-step guide to diagnosing and fixing the problem yourself.

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Power Cord and Plug Damage

The power cord is the most vulnerable part of any curling iron. Constant twisting and bending at the point where the cord meets the handle can break the internal wires even if the outer insulation looks fine. A broken wire inside the cord will stop power from reaching the heating element.

Inspect the cord carefully from the plug to the handle. Look for cuts, kinks, or areas where the cord feels unusually soft or flat. If you see any damage, do not try to repair the cord yourself. A damaged cord is a fire risk and should only be replaced by a qualified technician or the manufacturer. If the cord looks fine, move on to the next check.

Dead or Faulty Outlet

An outlet that has stopped working is a common reason a curling iron is not heating up. Bathroom outlets, in particular, are often connected to a GFCI (ground fault circuit interrupter) that can trip and cut power without warning. A tripped GFCI outlet will have a small reset button that may be popped out.

Plug a different device, like a hair dryer or a phone charger, into the same outlet to see if it works. If it does not, check the GFCI reset button on the outlet itself and press it back in. If the outlet still does not work, check your home’s circuit breaker panel for a tripped breaker. If the outlet is dead and the breaker is fine, you may need an electrician.

Automatic Shutoff Feature Activated

Many modern curling irons include an automatic shutoff feature that turns the iron off after a period of inactivity, typically 30 to 60 minutes. This is a safety feature designed to prevent fires if you forget to unplug the iron. If your curling iron is not heating up, it may have triggered this feature.

To reset the shutoff, simply unplug the curling iron, wait about 30 seconds, and plug it back in. Then turn the dial to your desired temperature and wait a few minutes to see if it heats up. If the iron starts heating again, the shutoff was the cause. If not, the problem is elsewhere.

Temperature Dial or Button Malfunction

The temperature control dial or buttons on a curling iron can wear out or become stuck over time. If the dial is set to a very low setting or is broken, the iron may not heat at all. Sometimes a dial that looks fine is actually not making proper contact internally.

Try turning the dial through its full range of settings while the iron is plugged in. Listen for a click or feel for resistance that indicates the dial is working. If the dial feels loose or does not click, it may need to be replaced. As a test, set the dial to the highest temperature and wait five minutes. If the iron remains cold, the dial or its internal connection is likely faulty.

Heating Element Burned Out

Every curling iron contains a heating element that converts electricity into heat. Over time, this element can burn out, especially in older irons or those used frequently at high temperatures. A burned-out heating element is a common reason a curling iron is not heating up and is usually not repairable at home.

There is no simple test for a burned-out element without a multimeter, but if the iron has power (the indicator light is on) and the cord and dial are fine, the element is the likely culprit. Unfortunately, replacing a heating element costs nearly as much as a new curling iron, so replacement is usually the practical solution.

Internal Wiring or Loose Connection

Inside the handle of the curling iron, wires connect the power cord to the heating element and the temperature control. These connections can loosen over time due to vibration and heat cycles. A loose connection may cause the iron to heat intermittently or not at all.

This is the most difficult cause to diagnose and fix without opening the iron. If you have checked the cord, outlet, shutoff, dial, and element, and the iron still does not heat, the problem is likely an internal loose connection. Unless you are comfortable with small electronics repair, this is a job for a professional or a reason to replace the iron.

How to Fix Your Curling Iron When It Is Not Heating Up

Here is a step-by-step checklist to work through the causes above. Start with the simplest checks first.

  • Check the power cord for visible damage. If damaged, stop using the iron and replace it.
  • Test the outlet with another device. If the outlet is dead, reset the GFCI or check the breaker panel.
  • Unplug the iron for 30 seconds and plug it back in to reset the automatic shutoff.
  • Turn the temperature dial through its full range and set it to the highest setting. Wait five minutes.
  • If the iron has power but no heat, the heating element is likely burned out and the iron needs replacement.
  • If all else fails, the internal wiring may be loose. Consider professional repair or a new iron.

If your curling iron is still not heating up after trying these steps, it is probably time to look for a replacement. For a detailed guide on choosing a new one, check out our roundup of the best curling irons.

Frequently Asked Questions

Why is my curling iron heating up but not getting hot?

If your curling iron heats up but never reaches a high temperature, the temperature dial may be stuck on a low setting, or the heating element may be partially damaged. Try turning the dial to the highest setting and waiting five minutes. If it still feels lukewarm, the element is likely failing.

Can a curling iron be repaired if it is not heating?

Some curling irons can be repaired if the problem is a loose wire or a faulty switch, but the repair cost often approaches the price of a new iron. If the heating element is burned out, replacement is almost always more expensive than buying a new curling iron.

How long should a curling iron last before it stops heating?

A quality curling iron typically lasts 2 to 5 years with regular use. Frequent use at high temperatures, dropping the iron, or yanking the cord can shorten its lifespan. If your iron is more than 3 years old and stops heating, it may simply be at the end of its service life.

Does a curling iron have a reset button?

Most curling irons do not have a physical reset button. Instead, they have an automatic shutoff feature that resets when you unplug the iron and plug it back in. Some high-end models may have a small reset switch, but this is rare. Check your user manual for specific instructions.

Most curling iron problems come down to a simple fix like resetting the shutoff or checking the outlet. If none of these steps work, the heating element or internal wiring is likely the issue, and replacement is the practical next step. For help choosing a reliable new model, see our guide to the best curling irons.