Ever jumped into the shower and been surprised by a blast of scalding water? Or maybe you’re stuck with lukewarm showers that leave you shivering, even in the Arizona heat? It’s frustrating, right? You just want a comfortable shower and suddenly you’re dealing with a plumbing puzzle. We get it. At Instant Plumbing and Rooter, we’ve been helping homeowners across Glendale, Phoenix, Scottsdale and the surrounding Valley cities for over 20 years. We know how important it is to have your hot water working just right. It’s not just about comfort; it’s about safety and saving money too. So, let’s walk through how to adjust your electric water heater temperature. It’s often easier than you think!
Why Would You Need to Change Your Water Heater Temperature?
First, why would you even want to mess with the water heater temperature? It’s a good question.
Safety Considerations
This is the biggest one. Super-hot water can cause serious burns, especially for kids and older adults. We want to make sure your water isn’t dangerously hot.
Energy Efficiency Goals
Believe it or not, your water heater can be a sneaky energy hog. If it’s set too high, you’re wasting energy heating water you don’t even use. Lowering the temperature can save you money on your electricity bill.
Comfort Preferences
Of course, comfort matters too! Some people like it hotter than others. Adjusting the temperature lets you dial it in just right.
What Tools Do You Need and How to Stay Safe
Okay, you’re ready to adjust. Here’s what you’ll need and how to do it safely.
Essential Tools
You probably already have these:
- A screwdriver (usually Phillips head)
- Maybe a nut driver (if your water heater uses screws with nuts)
- A flashlight (to see what you’re doing)
- A thermometer (to test the water temperature)
Critical Safety Precautions (Electricity!)
This is super important:
- Turn Off the Power: Find the circuit breaker in your electrical panel that’s labeled “Water Heater” and flip it to the “off” position. This prevents you from getting shocked.
- Double-Check: If you’re not sure which breaker is the right one, turn off the main power switch to your house.
- No Water Contact: Don’t touch any electrical parts with wet hands.
Adjusting Your Electric Water Heater Temperature: A Step-by-Step Guide
Alright, now for the actual steps.
1. Turn Off the Power
We can’t stress this enough. Go to your electrical panel and turn off the correct breaker.
2. Locate the Access Panels
Your water heater has two metal plates (access panels) on the side. These cover the thermostats and heating elements.
3. Remove the Insulation and Safety Covers
- Use your screwdriver to remove the screws holding the access panels in place.
- You might find some insulation behind the panels. Carefully move it aside.
- There will also be plastic safety covers over the thermostats. You can usually pull these off or bend them out of the way.
4. Find the Thermostats
Inside, you’ll see two thermostats. That’s right, two! Electric water heaters have one at the top and one at the bottom to heat the water evenly.
5. Adjust the Temperature Dials
- Each thermostat has a dial. It might have numbers, letters, or even words like “hot” and “warm.”
- Use a flathead screwdriver to turn the dials to your desired setting.
- Important: Set both thermostats to the same temperature.
6. Wait and Test
- Put everything back together (safety covers, insulation, access panels).
- Turn the power back on at the breaker.
- Wait a few hours for the water to heat up.
- Carefully test the water temperature with a thermometer, by getting hot water from the tap, into a cup and testing the temperature with the thermometer.
7. Reassemble the Unit
- If the temperature is right, you’re done!
- If not, repeat steps 1-6, making small adjustments and testing as you go.
Understanding Electric Water Heater Temperature Settings
Okay, let’s talk about what temperature you should actually set your water heater to.
Recommended Temperature
The U.S. Environmental Protection Agency (EPA) recommends setting your water heater to 120°F (49°C). This temperature is hot enough to kill most bacteria but not so hot that it will cause scalding. This is where we set all water heaters installed by Instant Plumbing and Rooter.
Temperature Scale Types (If Applicable)
Some dials have numbers, others have letters, and some have words. Check your owner’s manual to see what they mean.
Troubleshooting Temperature Problems
- Water Not Hot Enough: Increase the temperature a little.
- Water Too Hot: Decrease the temperature.
- No Change: Make sure both thermostats are set the same.
Common Problems When Adjusting Water Heater Temperature
It’s usually a smooth process, but here are some things that can go wrong.
Water Not Hot Enough After Adjustment
- Did you wait long enough? It takes time for the water to heat.
- Are both thermostats set the same?
- Is the water heater old or inefficient?
Water Too Hot After Adjustment
- Did you adjust it too much? Small adjustments are best.
- Is your thermometer accurate?
No Change in Temperature
- Is the power definitely on?
- Are the thermostats working? (This might require a professional to check.)
Leaking After Adjustment
- You shouldn’t have caused a leak by adjusting the temperature. If you see a leak, it’s likely a separate issue that needs a plumber.
Does Adjusting Water Heater Temperature Save Money?
This is a good question.
Energy Savings Potential
Yes, lowering the temperature can save energy. The higher you set it, the more energy it takes to keep the water hot.
Cost of Adjustment vs. Savings
Adjusting the temperature itself is free! The savings come from lower energy bills over time.
Long-Term Efficiency Benefits
A properly maintained water heater (including temperature adjustment) is more efficient and lasts longer.
DIY Temperature Adjustment vs. Calling a Plumber: Which is Right for You?
Should you do this yourself, or call us?
Pros of DIY Adjustment
- It’s free.
- It’s relatively easy.
Cons of DIY Adjustment
- You’re working with electricity.
- If you make a mistake, you could damage your water heater.
When to Call a Plumber for Help
- If you’re not comfortable working with electricity.
- If you can’t find the thermostats.
- If you suspect other problems with your water heater.
- If you have no hot water and think an adjustment will change that.
Adjusting Your Electric Water Heater: A Simple Task with Important Considerations
Adjusting your electric water heater temperature is a pretty straightforward job. But it’s important to do it safely and understand the potential benefits. We hope this guide has helped!
Frequently Asked Questions
Q: What is the safest temperature to set my water heater to?
A: The EPA recommends 120°F (49°C) to prevent scalding and conserve energy.
Q: How long does it take for the water to heat up after I adjust the temperature?
A: It depends on the size of your water heater, but it usually takes a few hours.
Q: Will lowering my water heater temperature save me a lot of money?
A: It will save some money, but the amount depends on how much hot water you use and how high your water heater was set before.
Q: Can I adjust the temperature on a gas water heater?
A: Yes, but the process is different. This guide is for electric water heaters.
Q: When should I call a plumber about my water heater?
A: If you’re unsure about any step, or if you suspect a bigger problem like a leak, call a professional. We’re here to help!
