Whether you’re dealing with a sudden issue or simply planning some routine maintenance, knowing how to turn off your water heater is a skill every homeowner should have. From unexpected leaks to strange rumbling noises, or even just preparing for an extended trip, there are plenty of practical reasons to shut down your unit safely. Taking the right steps not only protects your home from potential damage but also helps extend the life of your water heater and ensures your safety.
This guide is designed to help you turn off your water heater confidently and correctly, regardless of its type—gas, electric, or tankless. We’ll walk you through everything you need to know so you can approach the process with ease and peace of mind.
Important Considerations Before Starting
Before jumping into the steps to turn off your water heater, take a moment to review some essential precautions:
- Extended Shutdowns: If you don’t plan to use your heater for an extended period, turn off the power or gas supply as well as the cold water inlet valve. This prevents unnecessary wear, energy usage, or leaks.
- Freezing Temperatures: If there’s a chance your heater or pipes could freeze, drain the unit and associated piping to avoid damage during cold weather.
- When Restarting: Always ensure the water heater tank is completely refilled before powering it back on. Running an empty tank can severely damage the unit.
- Professional Inspection: After a prolonged shutdown, consider having a professional technician inspect your water heater to make sure it’s operating properly and safely.
- Model-Specific Instructions: Every water heater has unique features, so be sure to check your user manual for details specific to your unit.
- Communication: Let household members know you’re shutting off the water heater so they can adjust accordingly.
- Temperature Safety: If your water heater has been actively heating water, give it time to cool down before handling valves or controls. Touching hot components can cause burns.
- Smell of Gas: If you suspect a gas leak at any point—such as smelling gas or hearing a hissing sound—evacuate your home and call emergency services immediately. Never attempt to shut off a leaking gas line yourself.
Turning off a Gas Water Heaters
If you need to shut off your gas water heater for maintenance, repairs, or safety reasons, this guide will walk you through the steps. Whether it’s addressing a leak or preparing for an emergency, you’ll find straightforward instructions to complete the process safely and efficiently.
1. Locate the Gas Control Knob
Start by familiarizing yourself with the water heater’s control panel. Look for the knob marked with settings like “OFF,” “Pilot,” or “On.” This control knob is usually mounted near the base of the water heater on the gas control valve.
2. Turn the Gas Off
Safety first! Turn off the gas supply to the heater.
- Rotate the control knob to the “OFF” position. This should stop gas flow to the heater immediately.
- Optional Step for Extra Safety: Locate the separate gas shutoff valve. This valve is typically located on the gas line, near the water heater. Turn it 90° (a quarter turn) so it’s perpendicular to the pipe to completely cut off the gas supply.
Remember: after turning off the gas, wait a few minutes to ensure any residual gas has safely dissipated from the unit.
3. Shut Off the Water Supply (Optional):
If you’re conducting repairs or maintenance, you may also need to stop water from entering the heater.
- Locate the cold water inlet valve on top of the heater.
- Turn the valve clockwise until it’s fully closed. This prevents water flow into the tank while you work.
Pro Tip: Even if you don’t plan on draining the tank, shutting off the cold water inlet can help minimize potential leaks during repairs.
4. Drain the Tank (If Required):
Only drain your water heater if your specific maintenance or repair task requires it. Not all situations call for this step, but if it does, here’s how:
- Attach a standard garden hose to the drain valve located at the bottom of the tank. Make sure the other end of the hose leads to an appropriate drainage spot, like a floor drain or outdoor area.
- Open a nearby hot water faucet to relieve pressure in the system and allow air into the tank, making it easier for water to flow out.
- Slowly open the drain valve to let water escape. Be cautious, as the water can be hot!
Pro Tip: Don’t forget to wear gloves when working with hot water to avoid burns. Also, ensure the drainage area can handle the water volume.
5. Confirm Shutdown:
Finally, double-check that everything is properly turned off.
- Listen carefully near the water heater for any hissing sounds. Hissing could indicate a gas leak or another issue requiring professional assistance.
- If your water heater has a pilot light, make sure it’s fully extinguished. You may need to visually inspect the flame area to confirm.
By following these steps, you’ll have safely and effectively turned off your gas water heater, preparing it for maintenance or resolving a potential problem.
Turning off an Electric Water Heaters
When it’s time to power down your electric water heater—whether for maintenance or troubleshooting—it’s important to do so correctly to avoid safety hazards. Follow these steps to shut off the unit with confidence and prepare it for repair or inspection.
1. Locate the Circuit Breaker
Your first step is to find the circuit breaker dedicated to your water heater.
- Head to your home’s electrical panel (often found in a utility room, garage, or basement).
- Inside the panel, look for the breaker labeled “Water Heater” or one that corresponds to the correct amperage for your unit. If labels on the panel are unclear, proceed cautiously, as flipping the wrong breaker could disrupt other appliances.
Pro Tip: If you’re unable to locate the specific breaker, consider hiring an electrician to label your system for future reference. It’s a quick fix that can save time during emergencies.
2. Turn Off the Power
Shutting off the power is critical to avoid accidents like electrical shocks.
- Flip the circuit breaker for the water heater to the “OFF” position.
- Alternative Method: Some water heaters have an external disconnect switch mounted nearby (often resembling a light switch). If you find one, switch it off to cut the power.
After turning off the power, wait a moment to ensure the unit is completely de-energized. Safety first!
3. Shut Off the Water Supply (Optional)
Much like gas heaters, you may need to stop water flow into the tank while performing specific repairs or maintenance tasks.
- Locate the cold water inlet valve on top of the tank.
- Turn it clockwise until it’s fully closed. This prevents additional water from entering the heater.
When is This Necessary? Shutting off the water supply is typically required only for maintenance tasks like replacing heating elements or draining the tank. For general troubleshooting, it’s often not needed.
4. Confirm Shutdown
Double-check everything to make sure the water heater is fully powered down before you begin.
- Test the unit with a non-contact voltage tester. Place the device near the heater’s wiring to ensure no electricity is present. If the tester lights up, electricity is still flowing, and you should not proceed.
- Remember: Never assume the power is off without verifying!
Pro Tip: If your water heater has an indicator light or display, it should go dark, signaling that it’s no longer energized.
Tankless Water Heaters
Shutting off a tankless water heater is slightly different from traditional systems, but it’s just as straightforward when following the right steps. Whether you’re preparing for maintenance, an extended shutdown, or responding to an emergency, this guide has you covered.
1. Stop Water Demand
The first step is to ensure that no hot water is being used anywhere in your home.
- Close All Hot Water Faucets: Walk through your home and close any open hot water taps. This ensures the unit isn’t actively heating water when you shut it off.
- Why This Matters: Tankless systems heat water only as needed, so stopping water flow allows the system to wind down properly.
2. Disable the Unit’s Operation
Once all hot water faucets are closed, turn off the water heater’s heating function. How you do this depends on your specific model:
For Models with a Remote Controller:
- Locate the remote control for your tankless water heater.
- Press the Power On/Off button to turn the unit off.
- Verify that the “BURNER ON” indicator or similar light is no longer illuminated. This confirms that the system has stopped heating.
For Models with Manual Controls:
- Head over to the water heater unit itself.
- Locate the control panel or knob.
- Turn the control knob to the “OFF” position to disable the unit.
3. Shut Off the Gas Supply
If your tankless water heater runs on gas, you’ll need to turn off the gas supply for complete shutdown.
- Find the External Gas Shutoff Valve: This valve can typically be found on the gas pipe connected to the water heater.
- Turn the Valve Off: Rotate the valve clockwise (right) until it’s fully closed.
- Important Reminder: Be gentle while turning the valve. Use hand operation only—no tools—to avoid damaging the valve or over-tightening it.
Pro Tip: If you suspect a gas leak or smell gas, immediately contact your utility provider or a licensed professional.
4. (Optional) Shut Off Electrical Power
For longer shutdowns or maintenance, it’s a good idea to cut off the power supply to your unit.
- Locate your home’s electrical panel.
- Identify the circuit breaker for the water heater and switch it to the “OFF” position.
- This step ensures the system is completely de-energized, eliminates standby power usage, and enhances safety when performing repairs or leaving the unit unused for an extended time.
By following these steps, you can safely shut off your tankless water heater, ensuring the unit is ready for maintenance or downtime without causing damage or hazards.
FAQs about Water Heater Shut Offs
Why Would I Need to Turn Off My Water Heater?
There are several reasons you might need to turn off your water heater. If you’re performing maintenance or repairs, shutting it off prevents accidental water damage. In emergencies, like leaks or equipment malfunctions, turning off the unit can immediately stop further harm.
For extended periods of inactivity, such as vacations, shutting off the heater is a good way to conserve energy and reduce the risk of unexpected issues. Whether it’s routine work or an urgent problem, knowing how to safely turn off your water heater protects your home and prolongs the unit’s lifespan.
Is It Safe to Turn Off My Water Heater by Myself?
Yes, turning off your water heater is safe if you follow the correct steps. For gas water heaters, care must be taken to shut off the gas supply correctly to avoid hazards. Electric water heaters involve switching off the power at the circuit breaker to eliminate the risk of electrical shocks.
If you’re unsure about the process or run into complications, it’s always a good idea to contact a professional. When safety is a concern, trusting an expert is worth it.
How Do I Know If My Water Heater Is Electric or Gas?
You can easily determine if your water heater is electric or gas. Gas water heaters typically have a venting system to release exhaust gases. Electric models, on the other hand, have wiring leading to your home’s breaker panel and no venting system.
If you’re still unsure, look for labels on the unit. The manufacturer’s label or owner’s manual will specify the type of water heater you have and provide detailed shut-off instructions.
Do I Need to Turn Off the Water Supply as Well?
Yes, turning off the water supply is often necessary, especially during repairs or maintenance. Shutting off the cold water inlet stops additional water from entering the tank, helping to prevent flooding or worsening leaks.
If you need to drain the tank for repairs, turning off the water supply ensures no more water flows in while you work. Even in non-emergency situations, shutting off the water adds an extra layer of protection.
Will Turning Off My Water Heater Save Energy?
Turning off your water heater can save energy, but the impact depends on how long the unit remains off. For short periods, such as a day or two, the energy savings are minimal. However, shutting it off during extended absences, like vacations, can noticeably reduce standby energy consumption.
When you turn the system back on, reheating the water may use some extra energy temporarily. Still, the overall savings during a prolonged downtime typically outweigh this minor spike.
What Should I Do Before Turning My Water Heater Back On?
Before reactivating your water heater, it’s important to prepare properly. Check that any repairs or maintenance work has been completed. Inspect the tank and connections for leaks to ensure the system is safe to power on.
Make sure the tank is completely full of water—turning on an empty tank can damage the unit. Always follow any specific startup instructions in your owner’s manual to ensure a smooth process.
How Long Does It Take for the Water to Heat Back Up After Turning It On?
The reheating time for your water depends on factors like tank size, capacity, and temperature settings. Larger tanks naturally take longer to heat, as do higher temperature settings.
On average, most standard water heaters will take between 30 minutes to an hour to heat the water. Tankless systems are much faster, as they provide hot water almost instantly when turned back on.
Should I Turn Off My Water Heater During a Vacation?
Turning off your water heater during a vacation can save energy and reduce the risk of issues while you’re away. This is especially true for longer trips, where keeping the unit off avoids unnecessary standby energy consumption.
For short absences, like a weekend trip, it’s usually easier to leave the unit on. Reheating the water when you return can take some time, so weigh the trade-off between energy savings and convenience.
What Are the Risks of Not Turning Off the Water Heater During a Leak?
Failing to shut off your water heater during a leak can result in serious damage. Continuous water flow can exacerbate flooding, causing significant harm to your home and belongings.
For electric models, leaks may also pose a safety risk, as water exposure could lead to electrical shocks. Over time, the leak can damage the heater itself, potentially requiring expensive repairs or replacement. Acting quickly to shut off the unit minimizes these risks.
Take the Next Step for Expert Water Heater Support
Shutting off your water heater is a vital skill, but when it comes to repairs, maintenance, or troubleshooting complex issues, having a professional you can rely on makes all the difference. That’s where Bacon comes in. Whether it’s a gas, electric, or tankless water heater, our licensed technicians are ready to assist with everything from inspections and repairs to full replacements.
At Bacon, we prioritize your safety, convenience, and satisfaction. You’ll get personalized service with features like courtesy calls, live tracking of your technician, and transparent pricing—so there are no surprises. Plus, with same-day service availability, we’re here whenever you need us.
Don’t let water heater troubles interrupt your day. Call us at now to schedule your service with Bacon and experience hassle-free, professional care for your home.
