How To Set State Select Water Heater Temperature: It’s Simple

Are you tired of stepping into a shower that’s either scorching hot or disappointingly cold? Do you wish you could enjoy a perfectly comfortable water temperature every time you turn on the tap? If you’re using the State Select water heater you have the options. But how to set State Select water heater temperature?

When it’s a gas water heater, adjust the water temperature by rotating the gas control knob. But when it’s an electric water heater you’ll have to turn the water heater dial clockwise (to increase) or anticlockwise (to decrease).

Finding it informative? Let’s dive in and unlock the secret to state select water heater temperature setting.

How To Set State Select Water Heater Temperature?

We know State Select comes with different types of water heaters and the process for different water heaters is different. In this article, I’m going to discuss 7 different processes for setting the temperature for different types of State Select water heaters. So, let’s dig in –

how to set state select water heater temperature

How To Adjust Temperature For Residential Atmospheric Gas Water Heater

I’ll start by explaining the process for State Select residential atmospheric gas water heaters. Let’s check it.

Step 1: Set The Gas Valve

First, you’ll have to set the gas valve to the desired temperature. The “HOT” setting typically sets the water temperature to approximately 120°F. This temperature reduces the risk of scald injury. However, there are options for you to choose to set a higher temperature for specific purposes such as providing hot water for automatic dishwashers or laundry machines, or reducing bacterial growth. 

Higher tank temperatures, such as 140°F, can help eliminate bacteria causing smelly water and reduce waterborne diseases. Keep in mind that higher temperatures also increase the risk of scalding, even at 120°F.

Caution: If you increase the water heater’s temperature setting, it’s better to install Thermostatic Mixing Valves at each point of use. It’ll reduce the risk of scalding.

Step 2: Adjust The Water Heater’s Thermostat

Now locate the gas control valve on the water heater and locate the gas control knob. It is usually marked with temperature settings. Now, turn the gas control knob to the right to select the desired temperature setting:

  • “A” for approximately 128°F
  • “B” for approximately 138°F
  • “C” for approximately 147°F
  • “VERY HOT” for approximately 160°F
gas control knob of state select water heater

Keep in mind that the temperatures are approximate. The actual temperature of the heated water may vary.

Step 3: Wait For The Water To Heat Up

After adjusting the thermostat, wait for some time for the water to heat up. If you notice no hot water after two hours that means there is an issue with the heater. The issues can be related to –

  • Malfunctioning Thermostatic Mixing Valve in a faucet or shower control (check other faucets in the house for hot water).
  • Inadequate water heater capacity or excessive usage.
  • Reversed plumbing connections or a melted dip tube (commonly observed shortly after installation).
  • Plumbing leaks.
  • Accumulation of sediment or lime at the bottom of the tank.

Now according to the issue, you’ll have to troubleshoot it. You can follow the manual or call for a professional to fix the issue. 

Caution: If you have raised the temperature setting and the Thermostatic Mixing Valves are not correctly adjusted or not installed, there is a risk of scalding yourself when checking the water temperature.

Step 4: Check Water Temperature at Various Points of Use

To make sure you have the right temperature of water in different areas of your home like the bathtub, shower, or sink, follow these steps:

  1. First, check the water temperature at each of the mentioned places. This will help you understand if the temperature is as desired or if it needs adjustment.
  2. If you have Thermostatic Mixing Valves installed, you can use them to adjust the temperature.
  3. If you are not sure how to adjust the Thermostatic Mixing Valves or if you have them installed at all, it’s best to seek help from a qualified professional.

Caution: Always keep safety in mind when adjusting the temperature. Even at lower temperatures, there is still a risk of scalding. So, be cautious and take necessary precautions to prevent accidents.

How To Adjust Temperature For State Select Residential Direct Vent Water Heater

You will be happy to know that the temperature-adjusting process for this type of water heater is almost the same as the previous one. 

Here, Step 1, Step 3, and Step 4 are the same. The only difference here is in step 2 – adjusting the thermostat. So let’s see. 

Step 1: Follow the Previous Process in Step 1

Step 2: Adjust the Thermostat

Below I’m adding the State Select water heater thermostat adjustment process. 

First, locate the gas control valve on the water heater. Then, find the gas control knob, which is marked with temperature settings. Next, turn the gas control knob to the right, selecting one of the following settings:

  • “A” for approximately 130°F
  • “B” for approximately 140°F
  • “C” for approximately 150°F
  • “VERY HOT” for approximately 155°F

Please note that the temperatures shown are approximate and can vary.

Step 3: Follow the previous process in Step 3

Step 4: Follow the previous process in Step 4

How To Adjust The Temperature For State Select Residential Electric Water Heater

Now let’s move on to the electric water heater. Unlike the gas water heater the electric water heater temperature adjustment is a bit complex, However, don’t be afraid. 

Here’s a step-by-step guide on how to adjust the temperature of the electric water heater.

Step 1: Set the Desired Temperature

In the first step, start by adjusting the thermostats to your preferred temperature. The thermostats on this water heater are initially set by the factory at around 120°F to minimize the risk of scalding.

However, if you want you can increase or decrease the temperature according to your need. 

Step 2: Ensure Power is Off

Before adjusting the thermostat, ensure that the electrical power to the water heater is turned off at the circuit breaker panel. Or you can just remove the circuit’s fuses.

Step 3: Access the Thermostat

Now, remove the upper and lower access panels on the water heater. After that, fold away the insulation to access the thermostats.

Step 4: Adjust the Temperature

This is the most important step. First, locate the water heater dial. Then turn the water temperature dial clockwise (>>) to increase the temperature. And if you want to decrease the temperature, turn the dial counterclockwise (<<). To do so I advise using a flathead screwdriver to adjust the temperature adjusting screws. 

Adjust both thermostats to the same temperature setting. Never set the upper thermostat higher than the lower thermostat’s temperature setting. It’s necessary to prevent a shortage of usable hot water. 

Note: Some models have only one thermostat located behind the lower access panel.

Step 5: Replace Panels And Restore Power

At this step, fold the insulation back in place and secure the access panels. Make sure the panels are properly secured to reduce the risk of fire and electric shock. Then, turn the electric power on.

Step 6: Allow The Water To Heat Up

Wait for a few hours to allow the tank of cold water to heat up. If you still have no hot water after two hours that means there are other issues. Check the below reasons why it can happen. 

  • Sometimes, when installing a water heater, there can be a problem where there is no electricity.
  • When a new water heater is installed, it is common for the upper heating element to get burned out if it is not submerged in water.
  • In new installations, there is a red button on the upper thermostat called the Energy Cut Off. Sometimes it can trip and stop the flow of energy.
  • Occasionally, in new installations, the pipes that bring water into and out of the water heater can get mixed up and connected in the wrong way.
  • If the upper thermostat or its wires are broken in a water heater, it can cause the heater to stop working correctly.
  • If there is a big leak in the hot water pipes that is more than the water heater can handle, it may seem like the water heater is not making enough hot water.

Now according to the suggested problem fix it and hopefully you’ll be able to move on to the next step. 

Step 7: Check Water Temperature At Multiple Points Of Use

Here comes the final step. Now, to ensure the desired temperature is achieved at different points of use in your home, such as the bathtub faucet, shower, or lavatory sink, check the water temperature at these locations.

If you have Thermostatic Mixing Valves installed, adjust them as necessary to reach the desired water temperature.

How To Set Temperature On State Select Electric Tankless Water Heater

Now, I’m providing the guide on adjusting the temperature on a State Select electric tankless water heater:

Point of Use Model Only

Step 1: First, locate the temperature adjustment knob at the top of the circuit board near the plumbing connections as you can see in the below image.

circuit board diagram of state select water heater

Step 2: The factory setting is approximately 105°F (+/-1°F). To decrease the temperature, turn the knob to the left (counterclockwise). And to increase the temperature, turn the knob to the right (clockwise). I recommend using a small flat-blade screwdriver to turn the knob.

NB: The temperature can be adjusted within a range of 90°F (32°C) and 140°F (60°C). Ensure that you stay within this range while adjusting the temperature.

For Two or Four Chamber Models Only

In this case, to change the set temperature use the control buttons. Here’s how to do it.

Step 1: First, press and release either the UP or DOWN button (According to the image below). Then you’ll notice that the display will start blinking. It is an indication that you can adjust the temperature setting.

temperature setting board for two or four chamber model of state select water heater

Step 2: Press and hold the UP or DOWN button to scroll through the temperatures quickly. Every single press will adjust the temperature setting by one degree.

Step 3: Once you have reached the desired temperature, press the ENTER button to confirm and set the new temperature.

To Toggle Between Fahrenheit and Celsius:

  1. Press and hold the DOWN button for approximately five seconds (Follow the added image).
  2. The °F or °C LED will illuminate, indicating the unit of temperature measurement. The 7-segment LED will display the temperature set point in the corresponding units (Fahrenheit or Celsius).

How To Adjust Temperature On State Gas Tankless Water Heater (With Controller)

Now when it’s a gas tankless State water heater the process is slightly different. Below check the step-by-step guide on how to adjust the temperature with a controller.

Initial Steps (For Models 110U and 310U)

multi unit controller of state select water heater

Step 1: Turn on the 120 VAC power supply to the water heater or multi-unit controller.

Step 2: Press the “ON/OFF” button on the controller to turn it on (Look at the above image as it may help you). The STAND BY LED will light up to indicate that the controller is on.

Step 3: The current set temperature will be displayed on the controller’s screen (e.g. 120 °F).

Step 4: To set the temperature, press either the “HOT” or “COLD” buttons on the controller.

To Increase The Temperature From 120 °F to 125 °F

  1. First, make sure that the water heater is in StandBy mode.
  2. Press the “HOT” button to set the temperature to 120 °F.
  3. Press and hold both the “INFO” and “HOT” buttons for at least 3 seconds. Then, the remote will emit a beep, and the temperature will change to 125 °F.
  4. If you want to increase the temperature further, press the “HOT” button. You can adjust the temperature setting up to 140 °F.

NB: The above steps apply to most models, except for the -510U model. However, if you’re still confused about the temperature button, follow the below temperature table –

temperature table for state select water heater

To Increase The Temperature Above 140 °F (-510U model only)

  1. Ensure the heater is in StandBy mode.
  2. Press the “HOT” button and set the temperature to 140 °F.
  3. Now first press and then hold both the “HOT” and the “INFO” buttons for at least 3 seconds. You’ll hear the remote emitting a beep, and the temperature will change to 145 °F.
  4. To further increase the temperature, you can press the “HOT” button and adjust the temperature setting. It can be increased up to a maximum of 160 °F.

How To Adjust Temperature On State Gas Tankless Water Heater (Without Controller)

Now what if you want to adjust the temperature without the controller? It’s possible and here I’m adding the guide for adjusting the temperature on a State Gas Tankless Water Heater without a controller.

Before I start, let me mention – there are options to choose from two preconfigured temperatures, 120 °F (50 °C) and 140 °F (60 °C),

temperature setting diagram of state select tankless water heater
  1. Ensure that the gas supply to the water heater is turned on and that there is power supplied to the unit.
  2. Locate the computer board of the water heater and look for the DIP switch settings on the computer board. These switches control the temperature presets.
  3. Now follow the given image and identify the correct DIP switch positions for each temperature setting. Each black square represents a switch.
  4. Select the desired preset temperature by changing the position of the DIP switches. For example, if you want a temperature of 120 °F (50 °C), set the corresponding DIP switches accordingly (Follow the image for a better idea).
  5. Keep in mind that when the water heater is operating with a controller, the set temperature on the controller takes priority over the DIP switch settings.
  6. Verify that the temperature has been preset to 120 °F (50 °C) at the factory. This is the default temperature setting.
  7. Once you have adjusted the DIP switches to your desired preset temperature, close any access panels and secure them properly.
  8. Allow the water heater some time to adjust and reach the new temperature setting.
  9. Monitor the water temperature at various points of use in your home.
  10. Now for 140 °F (60 °C),  change the DIP switch setting on the computer board following the same way.

NB: If you’re using the 110U and 310U models, adjust only DIP switch No. 9. And if you’re using the 510U model, adjust DIP switch No. 5 located on the lower bank.

How To Adjust Temperature For State-Select Solar Water Heater?

To adjust the temperature setting of the water heater, follow these steps carefully. But first, let’s get familiar with the table about water temperature setting and the time to heat the water.

state select solar water heater temperature setting table

Step 1: Ensure the electrical power to the water heater is turned “OFF” at the junction box. 

Step 2: Now, remove the access panel and carefully fold back the insulation to gain access to the temperature controls.

Step 3: Rotate the water temperature dial in a clockwise direction to increase the temperature or in a counterclockwise direction to decrease the temperature according to your preference.

state select solar water heater temperature setting diagram

Step 4: Once the temperature adjustment is complete, securely fold the insulation back in place and replace the access panel.

Step 5: Finally, turn the power supply back “ON” to restore electrical power to the water heater.

Keep in mind, that whether you’re a single-wall or double-wall solar heater, this process is applicable for both types.

Caution: As hot water from solar water heaters can cause severe burns, it’s important to be aware of it. I advise installing mixing valves at the taps or at the solar water heater. Also, maintaining a thermostat setting of 120°F will help reduce the risk of burns. Ensure that young children do not use hot water taps or control their own bathwater.


What is the proper temperature setting for a water heater?

The recommended safe temperature for a water heater is 120 degrees Fahrenheit (to prevent scalding), while the common default setting is typically 140 degrees. According to the experts, temperatures below 120 degrees can create a breeding ground for bacteria, such as legionella. They can be the causes of diseases like Legionnaires disease, especially in stagnant water within the water heater.

What should I set the maximum temp on my water heater?

The maximum temperature you should set on your water heater is 140 degrees Fahrenheit. However, there is a different opinion among experts regarding whether it is more suitable to set it at 140 degrees or lower, such as 120 degrees. Ultimately, the decision on the appropriate temperature setting should depend on what is best for you and your family’s specific needs and preferences.

What is the normal temperature of hot water in Celsius?

The normal temperature range for hot water is typically between 60 and 65 degrees Celsius. However, by the time the hot water travels through your plumbing system and reaches your taps, it naturally cools down to around 35 to 46 degrees Celsius.

Is The water at 40°C warm or hot?

Water at 40°C is considered warm. Hot water is usually at a temperature of 54°C (130°F) or higher. Warm waterfalls within the range of 32°C to 43°C (90°F to 110°F). Cold water, on the other hand, is typically between 16°C and 27°C (60°F to 80°F).

Final Words

We’ve come to the final segment of the article. Hopefully, you have no more confusion on the query – how to set State Select water heater temperature? No matter what type of State Select water heater you have, I’ve given the process for all types. 

Now before I leave I’ll leave 2 tips for you. First, you can install Thermostatic Mixing Valves for consistent and safe water temperatures at different points in your home.

And second, take necessary precautions before you try to adjust the temperature such as wearing protective gloves and ensuring the power supply is turned off.

Well, if you are struggling with other issues with your water heater, then read our detailed troubleshooting guide on State Select gas water heater issues.

Leave a Comment