How to Turn On Your Shower Water Heater

Virginia Jul 01, 2026

Ever stepped into a cold shower on a chilly morning? It's not a pleasant experience, but it's one that can be easily avoided by understanding how to turn on your shower water heater. Whether you're dealing with an electric, gas, or tankless water heater, this guide will walk you through the process, ensuring you always have a warm, comfortable shower ready for you.

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Before we dive into the specifics, it's important to understand that water heaters are designed to heat water to a safe and comfortable temperature. The Department of Energy recommends setting your water heater to 120°F (49°C) to prevent scalding, especially for children and the elderly. Now, let's get started with the different types of water heaters.

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Electric Water Heaters

Electric water heaters are common in many households due to their affordability and ease of installation. They typically have two heating elements, one at the top and one at the bottom of the tank.

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To turn on an electric water heater, follow these steps:

Turning on the Circuit Breaker

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First, locate your home's circuit breaker panel. The water heater should be labeled. If it's not, you can test each switch by turning it off and then on again. If the water heater doesn't turn on, it's likely that the switch is in the off position.

Once you've found the correct switch, flip it to the 'On' position. If it doesn't stay on, there might be an issue with the wiring or the water heater itself, and you should contact a professional.

Resetting the Water Heater

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how to flush hot water heater on the floor with text overlay that reads, how to flush hot water heater

After turning on the power, you'll need to reset the water heater. This can be done by finding the reset button on the thermostat. It's usually red and located near the top of the tank. Press and release the button.

If the water heater doesn't start running, there might be a problem with the thermostat or the heating elements. In this case, it's best to call a professional for help.

Gas Water Heaters

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Gas water heaters are more energy-efficient than electric ones, but they require a gas supply and proper ventilation. Here's how to turn one on:

Lighting the Pilot Light

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First, locate the gas control valve on your water heater. It's usually at the bottom of the tank. If the pilot light is out, you'll need to relight it. Follow the instructions on the water heater's label, which typically involve turning the control valve to 'Pilot', pressing the reset button, and holding a flame to the pilot light opening until it stays lit.

Once the pilot light is lit, turn the control valve to 'On'. If the water heater doesn't start running, there might be a problem with the thermocouple or the gas supply. If this is the case, it's best to call a professional.

Checking the Gas Supply

If the water heater still isn't working, check the gas supply valve on the gas pipe connected to the water heater. It should be fully open. If it's not, turn it clockwise to open it.

If the gas supply valve is already open and the water heater still isn't working, there might be a problem with the gas supply to your home. In this case, you should contact your gas company.

Tankless Water Heaters

Tankless water heaters, also known as on-demand water heaters, heat water as it passes through the unit, rather than storing it in a tank. Here's how to turn one on:

Turning on the Power

Like electric water heaters, tankless water heaters need electricity to run. Locate your home's circuit breaker panel and find the switch labeled for the water heater. Flip it to the 'On' position.

If the switch doesn't stay on, there might be an issue with the wiring or the water heater itself. In this case, it's best to call a professional.

Resetting the Water Heater

After turning on the power, you'll need to reset the water heater. This can be done by finding the reset button on the control panel. It's usually red. Press and release the button.

If the water heater doesn't start running, there might be a problem with the control panel or the heating elements. In this case, it's best to call a professional for help.

Remember, if you're ever unsure about how to turn on your water heater or suspect there's a problem, it's always best to call a professional. Water heaters can be dangerous if not handled properly. Always prioritize safety.

Now that you know how to turn on your shower water heater, you can enjoy warm, comfortable showers whenever you want. Happy heating!