A malfunctioning cooktop can be frustrating, especially when you rely on it for daily cooking. Whether you have a gas or electric cooktop, several underlying issues may prevent it from heating properly or functioning as expected. Below are the most common causes and what they usually indicate.

Faulty Igniter (Gas Cooktops)

If your gas burners are clicking but not lighting—or not clicking at all—the igniter may be weak, clogged, or damaged. Over time, moisture, grease, and food debris can interfere with the spark needed to ignite the flame.

What it causes:

  • Burner not lighting

  • Delayed ignition

  • Continuous clicking

Solution:
Cleaning or replacing the igniter typically resolves this issue.

Defective Heating Element (Electric Cooktops)

For electric cooktops, if a burner doesn’t heat evenly or doesn’t turn on at all, it often indicates a burned-out heating element.

What it causes:

  • Uneven heat

  • One or more burners not working

Solution:
Testing and replacing the damaged heating element is necessary.

Damaged Infinite Switch or Control Board

Cooktops rely on control switches and electronic boards to regulate heat. When these fail, the burner may stay stuck on one temperature, not turn on, or behave erratically.

What it causes:

  • Burner stuck at one temperature

  • No heat control

  • Random shutdowns

Solution:
Replacing the infinite switch or control board restores proper function.

Loose or Burned Wiring

Over time, heat, electrical issues, or wear can cause wiring to burn, melt, or disconnect. This is especially common in older units.

What it causes:

  • Burner not working at all

  • Electrical smell or sparks

  • Intermittent heating issues

Solution:
A full wiring inspection and replacement of burnt or loose components is required for safe operation.

Gas Supply Issues (Gas Cooktops)

If none of your burners light, the problem may be with the gas supply. A partially closed valve, faulty regulator, or blocked gas line stops fuel from reaching the burners.

What it causes:

  • All burners failing to ignite

  • Low or uneven flame

Solution:
Checking the gas flow, valve, and regulator typically identifies the issue.

Sensor or Temperature Control Failure (Glass & Induction Cooktops)

Modern glass and induction models rely heavily on sensors that detect cookware and regulate temperature. When these sensors fail, the cooktop may not heat or may show error codes.

What it causes:

  • Cooktop not detecting cookware

  • Error messages

  • Overheating or automatic shut-off

Solution:
Sensor replacement or recalibration is required.

When to Call a Professional

Cooktop repairs often involve gas lines, high-voltage components, and sensitive electronics — areas where DIY repair can be dangerous. If your cooktop is not heating, shutting down randomly, or behaving unpredictably, it’s best to call a certified technician.

AF Appliance provides fast, safe, and reliable repair services for all gas, electric, and induction cooktops — with professional diagnosis and guaranteed results.