How to Light a Pilot Light on a Water Heater?

Do you have problems with the water heater’s gas heater? Because when the pilot’s light passes out, it indicates a drop in the pressure gradient, which eradicates the flames. The primary indication that there is still a fault with the gas burner is that your hot water tank will no longer heat. It is a very critical situation in which you have to understand the fundamentals of pilot light repair to restore the fire. It will not only guarantee that you have hot baths, but it will also stop any gas leaks in your home.

Although the directions vary depending on the type, with most heat pumps, you may begin by looking for a gas shutdown valve, usually situated across the front of the stove. It’s unpleasant and upsetting to have your electric or gas heater’s startup light flames go somewhere. Whenever it happens, you’re left lacking hot water, rendering even the most straightforward task like going to the bathroom a chore.

Do electric water heaters have pilot lights?

No, electric water heaters don’t have a pilot light as in a small flame. But they do have lights called Bezels, with red color. Remember that there is no gas or pilot light involved in electric water heaters.

But what to do if we have a water heater with pilot lights:

How to Light a Pilot Light on a Water Heater?

To light a pilot light on a water heater, you need to hold half-minute the ignition button and hold the pilot knob down simultaneously. You do not need to use a lighter because your pilot light will turn on. However, if this doesn’t work, you need to replace the thermocouple.

What is a thermocouple?

A thermocouple represents an electrical device consisting of two dissimilar electrical conductors, and it senses the pilot’s heat and allows gas to flow to the burner. In addition, the thermocouple measures temperature, so when the junction of the two metals is heated or cooled, a voltage is created that can be correlated back to the temperature.

thermocouple water heater

The job of the thermocouple is to keep the pilot lit.

This same thermocouple’s end is placed over the pilot light, creating a charge that keeps the control valve wide. If the voltmeter detects that your electric heater’s starter sun is coming out, it will turn off the gas flow to the burner. Thermocouples could fail, gather dust, or get bent out from the pilot beam’s flames overage.

In either instance, the thermocouple will strain to detect the gas boiler and turn off the power. Another explanation for why your gas hot water system check engine light won’t remain lit is a lack of combustion air. The lightbulb on your hot water system requires air to stay lit. Eventually, the light will die out. To increase the supply of flammable air, make sure the temperature heater isn’t encircled by dirt, lint, or dirt.

How to fix the water heater pilot?

To fix a water heater pilot, you usually need to replace a thermocouple electrical device. First, you need to Turn Off the Shutoff Valve, Unscrew the Nuts, Remove the Assembly and install a new thermocouple. In the last step, you need to reattach the three lines to the gas valve, and your job is finished. See the video below.


Maintain as much cleanliness as practicable in the external environment. Absolutely. If you are likely handy with all types of tools, you might be able to change the thermoelectric manually. To be here, turn off the gas inlet and detach the entire burner and thermistor system. If you don’t know how to make simple repairs, it’s preferable and safer to hire someone that does. A specialist can also examine your gas boiler for additional faults and provide advice or recommendations on any current or potential concerns. If you equip a gas hot water system, your pilot lights will go out at some stage. The lightbulb is an essential component of a gas hot water tank, and if it is not lighted or working correctly, you “warm” and will flow cold.

Learn to clean thermocouple video:

Knowing some knowledge is necessary, and how to ignite the gas boiler can lead to significant savings by resolving the problem yourself rather than getting a contractor plumber. Even though electronic electrics are prevalent in contemporary gas heating systems, some older boilers still require pilot lamps. That’s not unusual for your hot water tank to have problems if it utilizes a gas boiler. The post will assist you in troubleshooting the issue and determining what steps to take next. A tiny flame is used to start the burning in gas and LPG heat pumps. This little flame is known as a gas burner, and it is always lit.


Because when the boiler needs to boil the water from the reservoir, the lightbulb starts the propane grill. Consider the pilot light to be a spark. I could start a fire to start a fire or ignite a gas burner. However, if we may not have a flame, you won’t produce a fire or use your gas cooker. The same holds for a gas burner. If the lightbulb fails, your hot water tank will be unable to start the propane grill and hence will not be capable of heating it. If their heating is no longer attractive, your check engine light has likely burned out. However, there are other explanations for why you don’t have boiled water, so if that’s not the pilot bulb, you’ll have to do additional debugging.

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On that gas pressure regulator, you may see the following errors or flickering light. This led indicator may change colors to warn you of an issue. Look for a label on the vessel’s side that explains what the signal message signifies. Another of the difficulties that are usually mentioned is the spark plug being around. If you perform a visual check and do not see the light, the lightbulb is most likely out. Even though your gas pressure switch shows a problem with the power switch, it is essential to inspect a flame visually. Its combustion chamber door is generally located below the gas pressure regulator at the end of the water radiator. Depending on your hot water system, you’ll need to replace or unlock the gate to see the combustion compartment and pilot lighting tube. That fault is not about the power switch if you ever see flames.

What to do when a thermocouple is not working?

If the thermocouple isn’t operating correctly, the check engine light won’t stay lit. It’s conceivable that the thermostat is filthy, bent, or damaged, and as much as you may be capable of adapting or cleaning it, replacing it is typically the best option.
In modern heat pumps, temperature sensors are sometimes referred to as flame sensors, although many heaters feature a running pilot light that uses a thermocouple. This assignment could be a good fit for you if you’re experienced with home improvements and operating electric appliances throughout this scenario. You can find out on your own about how to do it here. Some householders, however, prefer to engage a plumbing company to handle the task for them.

Because when a hot water system gas light goes out, it is usually not harmful. Most propane heating systems include valves that shut off the gas pipeline when the spark light passes out. This is a critical safety element, and if your hot water tank did not have it, you would have had a leading or methane gas leak on her fingers, which might lead to an accident. However, when the boiler is in a contained location, this condition might be deadly. Therefore, there was nothing better than turning off your electric heater’s gas boiler in general.


However, remember that you will no longer be connected to heated water after the water level has warmed. In actual existence, many situations occur in which shutting off your gas boiler is a good idea. Specialists, for one, frequently advise you to do so when traveling on holidays. Cutting off the gas boiler on your hot water system can save you some on your fuel bills since the hot water tank will not move water heat while you are away.

Mark Brown

Mark Brown

Mark Brown is a construction engineer from California who has been working as an independent contractor and writer for the past 15 years. From 2022 onwards, Mark has also been contributing author of home repair articles at Read more on Mark Brown's biography page. Contact Mark:

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