Electric water heaters do not have a pilot light
Electric water heaters use heating elements instead of a pilot light. These are metal rods that sit inside the tank and heat water directly when electricity flows through them. There is no flame, no gas, and nothing that needs to stay lit. When you turn on the thermostat, electricity powers the element. When the water reaches the set temperature, the element shuts off automatically.
This is the main difference between electric and gas water heaters. Gas models need a pilot light—a small flame that stays burning to ignite the main burner when hot water is called for. Electric models skip that step entirely. The heating element does the job on its own, controlled by a thermostat and a straightforward on-off switch.
Key Takeaways
- Electric water heaters have heating elements, not pilot lights, so there is no flame to maintain or relight.
- The heating element is a metal rod inside the tank that turns on and off based on water temperature, controlled by a thermostat.
- If your electric water heater stops producing hot water, the problem is usually a failed heating element or a tripped breaker, not a pilot light issue.
- Electric models are simpler to troubleshoot than gas models because there are fewer moving parts and no combustion involved.
How electric heating elements work
An electric water heater typically has one or two heating elements depending on the tank size and model. The element is a metal tube filled with a coiled wire that heats up when electricity passes through it. Think of it like the coil in a toaster or an electric stove burner—the resistance in the wire creates heat.
The thermostat reads the water temperature inside the tank. When the water cools below the set point (usually 120°F), the thermostat closes a switch and sends power to the heating element. The element warms the water. Once the temperature reaches the set point again, the thermostat opens the switch and cuts power. The element stops heating. This cycle repeats throughout the day and night.
Most electric water heaters have a reset button on the thermostat itself. This button cuts power to the element if the water gets too hot—a safety feature. If the reset button has tripped, the element will not heat even if the thermostat is set correctly.
Why electric water heaters are simpler than gas models
Gas water heaters need a pilot light because they rely on combustion. The pilot is a small, continuous flame that ignites the main burner when the thermostat calls for heat. If the pilot blows out, the burner cannot light, and you have no hot water. Relighting it requires a match or lighter and sometimes a call to a technician.
Electric models eliminate this problem. There is no flame to blow out, no gas line to check, and no combustion byproducts to vent. The heating element straightforward turns on and off. The only things that can fail are the element itself, the thermostat, or the electrical connection—all of which are straightforward to diagnose.
What to check if your electric water heater is not heating
If your electric water heater stops producing hot water, start with the simplest checks. First, look at the breaker panel. Electric water heaters draw a lot of power, and the dedicated breaker sometimes trips. Flip the breaker all the way off, then back on. Wait a few minutes and test the hot water.
Second, check the reset button on the thermostat. It is usually a red button on the side of the tank. Press it once. If it clicks, the button had tripped and you may have power restored to the element. Again, wait a few minutes for the water to heat.
If the breaker keeps tripping or the reset button trips repeatedly, the heating element or thermostat has likely failed and needs replacement. This is a job for a licensed plumber or electrician—do not attempt to replace a heating element yourself, as it involves draining the tank and working with high-voltage wiring.
Maintenance differences between electric and gas models
Electric water heaters require less routine maintenance than gas models. You do not need to worry about the pilot light, gas line leaks, or venting issues. The main maintenance task is flushing the tank once a year to remove sediment buildup, which applies to both electric and gas models.
You should also check the temperature and pressure relief valve annually. This valve is a safety device on both types of heater. It opens if pressure or temperature gets too high, preventing the tank from rupturing. Testing it is straightforward: lift the lever slightly and listen for a hiss of air or water. If nothing happens, the valve may be stuck and should be replaced.
Beyond those two tasks, electric water heaters are largely maintenance-free. The heating element lasts 8 to 15 years on average, depending on water hardness and usage. When it fails, it must be replaced—there is no repair option.
Lifespan and replacement of heating elements
A heating element typically lasts between 8 and 15 years. Hard water—water with high mineral content—shortens the lifespan because minerals build up on the element surface and reduce its efficiency. If you live in an area with hard water, your element may fail closer to 8 years. Soft water areas may see elements last 12 to 15 years.
When an element fails, the water heater stops heating. You will notice the water is lukewarm or cold even after the heater has been running for hours. Replacement involves draining the tank, unscrewing the old element, and installing a new one. This is not a DIY task unless you have plumbing experience. A plumber can replace an element in 1 to 2 hours, and the element itself costs between $150 and $300 depending on the model.
Frequently Asked Questions
Can an electric water heater have a pilot light?
No. Electric water heaters use heating elements powered by electricity. Only gas water heaters have pilot lights. If you have an electric model, there is no pilot light to check or relight.
What happens if the heating element burns out?
The water heater will stop producing hot water. The tank will hold water at room temperature, and the element will not heat it. You will need to replace the element, which requires draining the tank and removing the old element. This is a job for a plumber.
Why does my electric water heater keep tripping the breaker?
A tripping breaker usually means the heating element or thermostat is failing and drawing too much current. It can also indicate a short circuit in the wiring. Do not keep resetting the breaker. Call a plumber or electrician to diagnose the problem, as repeated tripping can damage the breaker panel.
Is it normal for an electric water heater to make noise?
Some noise is normal—you may hear a hum when the element is heating or a pop when sediment shifts in the tank. Loud banging or rumbling usually means sediment has built up on the element. Drain the tank to flush out the sediment. If noise continues after flushing, the element may be failing.
How long does it take an electric water heater to heat a full tank?
Most electric water heaters take 1 to 2 hours to heat a full tank from cold. The exact time depends on the element wattage, tank size, and incoming water temperature. Larger tanks and lower wattage elements take longer. Gas heaters are typically faster, heating a tank in 30 to 40 minutes.