Electronic ignition water heater won’t light

Electronic ignition water heater won’t light. Modern units are built to consume electricity, although freestanding pilots were in big desire in previous times.

Whenever it concerns relevancy, the very last choice isn’t as useless as it once was, but it’s no more as effective as electronic ignition.

This is because standing pilots demand a continuous supply of gas and use a lot of BTUs, between 600 to 800, for 24 hours of continuous operation.

Another disadvantage is that your gas bills will not be comfortable when you arrive, resulting in high monthly expenses.

Keep reading to discover more.

Electronic ignition water heater won’t lightelectronic ignition water heater won't light 2021

If you’ve recently installed the unit and observed that the electronic ignition isn’t working, it may be due to one of these reasons:

  • Igniter with a defect

An igniter is found in 99% of units. There will be no light whenever it is out of order. Finding a vendor to verify this version’s authenticity may be the answer to your problem.

A professional will examine to see if the water heater igniter receives enough power to start the device. A professional may recommend replacing your water heater pilot if there is a clear issue and it won’t light.

  • Spark Electrode Isn’t Workingspark electrode isn't working

Spark electrodes are used in many devices to start the actual ignition process. It functions by sending out signals or by generating high-voltage sparks regularly.

The pilot is lit if the call is received.

When the water heater igniter fails to ignite, hiring a contractor to safely replaces it is an excellent choice.

  • Pressure Sensor Isn’t Functioning

A pressure sensor could also be faulty, resulting in your water heater not lighting. When the airflow required for work is attained, it is usually closed, as well as the unit then starts the ignition.

The ignition will not ignite if it does not receive enough airflow or absorb it for whatever reasons.

In this scenario, finding a builder will help determine the fundamental cause of improper behavior, whether the element is malfunctioning or does not have a sufficient connection.

  • Thermocouplethermocouple

Last but not least, a thermocouple that functions as a pilot flame detector might cause improper ignition.

If it is incapable of detecting any, the ignition will not occur, and there will be no light.

Fix The Problem

Follow to fix your problem.

Try To Light it multiple Times

Before you proceed with the rest of the diagnostics, you should try lighting it several times. If it’s an occasional pilot igniter, double-check that the pilot is lit before turning it on.

It may take very few tries to get a pilot light to light. You’ll have to wait for the gas to dissipate before you can try it again.

Defective Thermocouple

The next issue on the list could be a broken thermocouple. The thermocouple detects the pilot flame. You will not be able to light the pilot by pressing the igniter if this is damaged or not functioning effectively.

It’s possible that the thermocouple is damaged and has to be replaced, or it could just be loose.

Check the wirescheck the wires

There will be many wires leading to the igniter. These wires might become loose at times, causing an issue with the power supply.

Inspect the igniter for any open wires; if you find any, you may have to resolder the wires or have them reattached by a specialist.

Look For the appropriate Voltage

Next, double-check that the water heater is receiving the proper voltage. Your igniter can fail if you have too much electricity (above 125 VAC).

Check the voltage going to the igniter using your multimeter. 

Water heater piezo igniter won’t spark

This procedure checks the igniter for any visible cracks or breaks. If any visible cracks or breaks are present, replace the piezo igniter.

If a spark does not appear when pressing the igniter, it is still ok to use out of principle – this would point to a possible issue on the gas valve on top of the gas tanks, which is part of another step in this procedure on page 14.

Honeywell water heater igniter no spark

To check if the igniter is defective, first make sure it is getting any voltage. If there is no voltage moving from the wall to the ignitor, check the wires from the burner for breaks.

If no breaks are found in any of the wires leading to or from the ignitor, then replace them with a new one.

Rheem water heater igniter won’t spark

Although a blocked gas line can potentially cause the pilot light on a Rheem water heater not to stay lit or to blow out, you’ll need to check that another issue did not cause the aforementioned problem.

Either faulty thermocouple—the part of the water heater which senses when it’s hot enough for the pilot light to ignite.

It might be the culprit, but there may also be little things like drafts or spaces between fixtures and floors which throw off heat accumulation in certain spots.

Of course, these issues are easy enough to resolve yourself if you know they’re bothering you, but if anything’s wrong with your gas valve Rheem heating experts recommend bringing in someone for repairs sooner than later.


We’ve covered the most common causes and treatments for Electronic Ignition Water Heater Won’t Light in this post. Electronic ignition is a problem with heaters.

It works some days and doesn’t work at all on others. By reading our advice, you can quickly resolve this issue.

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