Electronic pilots use a spark or hot surface to ignite the gas, not a standing flame

An electronic pilot on a water heater works differently from a traditional standing pilot light. Instead of keeping a small flame burning all the time, an electronic pilot creates a spark or heats a surface only when the thermostat calls for heat. When you turn the gas valve to the pilot position and press the ignition button, you are sending an electrical signal that either creates a spark near the gas outlet or heats a ceramic element until it glows. The gas ignites when it reaches that spark or hot surface.

The advantage is efficiency — the pilot does not waste gas by burning continuously. The disadvantage is that if the spark igniter or heating element fails, you cannot light the pilot manually with a match the way you can with a standing pilot. You will need to replace the igniter or call a technician.

Key Takeaways

  • Electronic pilots ignite gas with a spark or hot surface, not a standing flame, so you cannot light them with a match.
  • The ignition button sends power to either a spark electrode or a hot-surface igniter, depending on your heater model.
  • Hold the gas valve on pilot and press the ignition button repeatedly for 30 to 60 seconds while watching for a flame.
  • If the pilot does not light after one minute of button presses, stop and wait five minutes before trying again to avoid flooding the combustion chamber with gas.
  • A clicking sound means the spark igniter is working; no click usually means the igniter has failed and needs replacement.

Locate the gas control valve and pilot light assembly

Open the access panel or door on the front of your water heater. You will see a metal control valve — usually labeled with positions for Off, Pilot, and On. Below or near that valve is the pilot light burner, a small opening where the flame should appear. Some heaters have the ignition button on the valve itself; others have it on a separate electronic module mounted nearby.

Before you do anything, make sure the heater has power. Electronic pilots need electricity to create the spark or heat. Check that the power cord is plugged in or that the circuit breaker for the heater is on. If the heater has been off for more than a few hours, the system may need time to reset.

Turn the gas valve to pilot and press the ignition button

Rotate the gas control valve to the Pilot position. This restricts gas flow to only the pilot burner, not the main burner. Then locate the ignition button — it is usually red or black and labeled "Ignition" or "Spark." Press and hold it, or press it repeatedly depending on your model. You should hear a clicking sound if the spark igniter is working. That clicking is the spark electrode firing.

While pressing the button, watch the pilot opening for a small blue flame. Keep pressing for 30 to 60 seconds. If you see a flame appear, continue holding the button for another 10 to 15 seconds to make sure the flame is stable, then release. The flame should stay lit once you let go of the button.

What to do if the pilot does not light on the first try

If no flame appears after one minute of pressing the ignition button, stop and wait at least five minutes before trying again. Pressing the button continuously without a flame can flood the combustion chamber with unburned gas, which is a safety hazard. The five-minute wait allows any excess gas to clear.

On your second attempt, follow the same steps: valve to Pilot, press the button for 30 to 60 seconds, watch for flame. If the pilot still does not light, listen carefully for the clicking sound. A rapid clicking means the spark igniter is firing but the gas is not igniting — this usually means the gas supply is off, the gas line is blocked, or the igniter electrode is too far from the burner opening. No clicking at all means the spark igniter itself has failed and will need to be replaced by a technician.

Move the valve to On once the pilot is lit

Once the pilot flame is burning steadily, turn the gas control valve from Pilot to On. This opens the gas supply to the main burner. The thermostat will now control when the main burner fires to heat water. You should hear the main burner ignite within a few seconds, or it will ignite the next time the water temperature drops below the thermostat setting.

The pilot flame should remain lit while the valve is in the On position. If it goes out after you turn the valve to On, turn it back to Off, wait a minute, and try the whole process again. Repeated failure to stay lit usually means the thermocouple (a safety device that detects the pilot flame) is faulty or the pilot flame is too weak to trigger it.

Troubleshooting when the igniter clicks but the pilot will not light

If you hear the spark igniter clicking but see no flame, the problem is usually one of three things: no gas reaching the pilot, the igniter electrode is dirty or misaligned, or the gas is not mixing properly with air. First, check that the main gas supply valve to the heater (usually a ball valve on the incoming gas line) is fully open — turn the handle so it is parallel to the pipe.

If gas is reaching the heater, the igniter electrode may be fouled. Look at the small electrode near the pilot opening — it should be clean and positioned about one-eighth inch from the gas outlet. If it is covered in soot or corrosion, you can try gently cleaning it with a dry cloth or fine sandpaper. Do not use water or liquid cleaners. If cleaning does not help, or if the electrode is cracked or bent, it will need replacement.

When to call a technician instead of troubleshooting further

If the igniter clicks but the pilot will not light after cleaning, or if there is no clicking sound at all, the electronic ignition system has a component that has failed. The spark module, the igniter electrode, the gas valve solenoid, or the wiring between them may be defective. These parts require technical knowledge and tools to diagnose and replace safely.

Do not attempt to force the system to work by holding the button for extended periods or by trying to light the pilot with a match — electronic pilots are designed to work only with their ignition system, and bypassing that system can create a safety hazard. A service technician can test the electrical circuit, replace the failed part, and verify that the system is working correctly before leaving.

Frequently Asked Questions

Can I light an electronic pilot with a match or lighter?

No. Electronic pilots are designed to ignite only through the spark igniter or hot-surface element. Attempting to light one with a match will not work because the gas outlet is positioned to meet the spark, not an open flame. If the electronic ignition fails, you need a replacement part, not a workaround.

Why does the pilot light go out after I turn the valve to On?

The thermocouple — a safety device that detects the pilot flame — is likely not sensing the flame properly. This can happen if the pilot flame is too weak, the thermocouple is dirty, or the thermocouple itself has failed. Have a technician test and replace the thermocouple if needed.

How long should I hold the ignition button?

Press the button for 30 to 60 seconds while watching for a flame. Once the flame appears, hold the button for another 10 to 15 seconds to stabilize it, then release. If no flame appears after one minute, stop and wait five minutes before trying again.

What does the clicking sound mean?

Clicking is the spark igniter firing — it means the electrical system is working. If you hear clicking but see no flame, the problem is with gas flow or the igniter electrode position, not the spark itself. If you hear no clicking at all, the spark igniter or its power supply has failed.

Is it safe to keep pressing the ignition button if the pilot will not light?

No. Pressing the button continuously for more than one minute without a flame can flood the combustion chamber with unburned gas. Always stop after one minute and wait at least five minutes before trying again. This prevents a potential safety hazard.