how to relight hot water tank

3 min read 06-02-2025

Meta Description: Learn how to safely relight your hot water tank! This comprehensive guide walks you through the process step-by-step, covering gas and electric models, troubleshooting common issues, and emphasizing safety precautions. Don't get burned – follow these simple instructions to get your hot water flowing again!

Understanding Your Hot Water Heater

Before you begin, it's crucial to identify the type of hot water heater you have: gas or electric. The relighting process differs significantly between the two. Incorrectly attempting to relight a gas water heater could be dangerous.

Gas Hot Water Heaters

Gas hot water heaters use a pilot light or electronic ignition system to heat water. If the pilot light goes out or the ignition fails, you'll need to relight it. Never attempt to relight a gas hot water heater if you smell gas. Call a qualified plumber immediately.

Electric Hot Water Heaters

Electric hot water heaters don't have a pilot light. Issues usually involve a tripped breaker or a malfunctioning heating element. Relatively simple to troubleshoot, you might just need to reset the breaker or call an electrician for more complex repairs.

How to Relight a Gas Hot Water Heater

Safety First! Always ensure proper ventilation in the area surrounding your water heater. Open a window to allow fresh air circulation. Have a flashlight handy; never use matches or a lighter near a potential gas leak.

Step 1: Check the Gas Supply

Ensure the gas supply to the water heater is turned on. Locate the gas valve (usually near the water heater) and verify it's in the "on" position.

Step 2: Locate the Pilot Light

The pilot light is usually a small, constantly burning flame located at the bottom of the water heater. You may need to remove a small access panel to see it.

Step 3: Relight the Pilot Light (If Applicable)

Pilot Light with a Standing Pilot: Hold a lit match or lighter near the pilot light opening. Simultaneously, press and hold the gas valve button. You should see the gas ignite. Keep holding the button for about 60 seconds after the flame lights to allow the thermocouple to heat up. The thermocouple senses the flame and keeps the gas flowing.
Electronic Ignition: If your water heater has electronic ignition, there will be a button to push for ignition. The water heater should ignite automatically.

Step 4: Check the Flame

Once lit, verify the pilot light is burning steadily. If it flickers or goes out, repeat the process. If it continues to be problematic, call a qualified plumber.

How to Troubleshoot an Electric Hot Water Heater

Electric water heaters are generally more straightforward than gas models. Most issues stem from power supply problems.

Step 1: Check the Breaker

Go to your electrical panel and locate the breaker for your water heater. If it's tripped (switched to the "off" position), switch it back on.

Step 2: Check the Heating Elements (Advanced)

If the breaker is on and the water isn't heating, the heating element might be faulty. This requires more advanced troubleshooting and possibly replacement. It’s best to call a qualified electrician for this.

Step 3: Check the Thermostat (Advanced)

The thermostat controls the water temperature. A faulty thermostat can prevent the water from heating. Again, professional assistance is often recommended for this repair.

When to Call a Professional

If you're uncomfortable performing any of these steps, or if you suspect a gas leak, always call a qualified plumber or electrician. Attempting to repair a water heater incorrectly can be dangerous and lead to further damage or injury.

Remember safety is paramount when dealing with gas appliances and electrical systems. If you're unsure about any aspect of this process, it's always best to seek professional help.