If your air fryer is not heating up, the most common cause is a tripped internal thermal fuse or a faulty power connection. The thermal fuse is a safety device that cuts power if the appliance overheats, and it can blow after a cooking session or due to a power surge. Other frequent reasons include a blocked exhaust vent, a worn-out heating element, or an issue with the control board. Before you consider a replacement, check these simple fixes first.

Illustration for: Air Fryer Not Heating Up: Causes and Fixes for 2026

Tripped Thermal Fuse

Most air fryers have a thermal fuse that acts as a safety cutoff. If the internal temperature gets too high, the fuse blows and stops the heating element from receiving power. This can happen after a particularly long cooking cycle, especially if the fryer was overloaded or the vents were blocked.

To check this, unplug the air fryer and let it cool completely for at least 30 minutes. Then plug it back in and try a short test cycle. If it still does not heat, the thermal fuse likely needs replacement. This is a job for a qualified technician, as it involves disassembling the unit and soldering a new fuse.

Faulty Power Cord or Outlet

A loose or damaged power cord can prevent your air fryer from receiving any electricity. Inspect the cord for cuts, fraying, or bent prongs. Also test the outlet by plugging in a different device, like a lamp, to see if it powers on.

If the outlet works but the cord looks damaged, stop using the appliance immediately. A frayed cord poses a fire risk. Contact the manufacturer for a replacement cord or service. Never use tape or a makeshift repair on a damaged power cord.

Blocked Exhaust Vents

Air fryers rely on proper airflow to circulate hot air around the food. If the exhaust vents on the back or bottom of the unit are blocked by debris, grease buildup, or nearby objects, the internal temperature can rise too quickly, triggering the thermal fuse or preventing the heating element from working efficiently.

Check the vents for any visible obstructions. Use a soft brush or a vacuum with a brush attachment to remove dust and grease. Ensure there is at least 4 to 6 inches of clearance around the air fryer on all sides, especially the back where the exhaust port is located.

Worn Out Heating Element

The heating element is the coil inside the air fryer that generates heat. Over time, it can burn out, especially if the appliance has seen heavy use for several years. A burned out element will not glow red when the air fryer is turned on, and the fan may still run but no heat will be produced.

To check this, look through the cooking basket or a vent while the air fryer is running on a high temperature setting. If you see no visible glow or feel no heat after a few minutes, the heating element is likely dead. Replacing it usually costs more than buying a new air fryer, so this often leads to a replacement decision.

Faulty Control Board or Thermostat

The control board sends signals to the heating element and fan. A malfunctioning board or a broken thermostat can cause the air fryer to think it is at the right temperature when it is not, or to refuse to send power to the heating element at all. This issue is more common in older units or those that have experienced power surges.

Signs of a control board problem include the display showing error codes, the fan running but no heat, or the unit turning off unexpectedly during a cycle. This repair is complex and often not cost effective for a mid range air fryer. If you suspect a control board issue, it is usually time to shop for a replacement.

How to Fix an Air Fryer That Is Not Heating Up

  • Unplug the air fryer and let it cool completely for 30 minutes, then test it again to reset the thermal fuse.
  • Inspect the power cord and outlet for damage or loose connections.
  • Clean the exhaust vents and ensure proper clearance around the unit.
  • Check the heating element for visible glow or heat output after a few minutes of operation.
  • Contact the manufacturer if the control board or thermostat is suspected to be faulty.

If your air fryer is still not heating after these steps, it may be time to consider a new one. However, for a direct air fryer recommendation, you will want to look for a dedicated appliance review on this site.

Frequently Asked Questions

Can I reset my air fryer if it is not heating up?

Yes, unplugging the air fryer for 30 minutes often resets the internal thermal fuse. This simple step solves many no heat issues. If that does not work, the fuse may need professional replacement.

Why is my air fryer fan running but not heating?

This usually points to a faulty heating element or a tripped thermal fuse. The fan runs independently of the heating circuit, so it can still spin even when the element is dead or the fuse has cut power.

Is it worth repairing an air fryer that does not heat?

For most mid range air fryers, the cost of replacing a heating element or control board is close to the price of a new unit. Unless your air fryer is a high end model under warranty, replacement is usually more practical.

How often do air fryer heating elements fail?

With normal use, a heating element typically lasts 3 to 5 years. Frequent overheating, blocked vents, or power surges can shorten that lifespan significantly. Regular cleaning and proper clearance help extend its life.

Closing Thoughts

An air fryer that is not heating up usually has a simple cause like a tripped fuse, blocked vent, or a worn out element. Work through the checks above before deciding on a replacement.