Can I set the temperature higher than 120℉ on my Rinnai tankless?

If you have a Rinnai tankless water heater, you may wonder if you can set the temperature higher than 120℉. After all, you want to enjoy a hot shower or bath without running out of hot water. However, you also want to be safe and avoid scalding yourself or damaging your plumbing system.

So, how do you adjust the temperature on your Rinnai tankless water heater? And what are the risks and benefits of doing so? In this blog post, I will answer these questions and show you how to set the temperature higher than 120℉ on your Rinnai tankless water heater if you choose to do so.

Steps to  set the temperature higher than 120℉ on my Rinnai tankless?

For your safety, Rinnai tankless water heaters come with a maximum temperature default setting of 120℉ to help prevent scalding. However, by following these simple steps, you can increase the temperature to 140℉ if you choose

1. Locate the dip switch panel on your water heater. Depending on your model, it may be on the front panel or inside the unit. You may need to remove a cover or a panel to access it.

2. Find the dip switch labeled SW1 and flip switch 6 to the ON position. This will enable the high temperature setting on your water heater.

3. Use the temperature controller on your water heater or a remote controller to adjust the temperature to your desired level. You can use the up and down arrows to change the temperature in increments of 5℉. Confirm the new temperature setting on the LED display and enjoy your hot water.

You should be careful when setting the temperature higher than 120℉ on your Rinnai tankless water heater, as it can cause serious burns to your skin or damage to your plumbing system.

Here are some tips to avoid these risks

• • Install a thermostatic mixing valve on your hot water outlet to regulate the water temperature and prevent scalding.
  • Install a pressure relief valve on your cold water inlet to protect your water heater from excessive pressure and possible rupture.
  • Check your local codes and regulations for the maximum allowable temperature for hot water in your area. Some states or municipalities may have different standards or requirements for water heater temperature settings.
  • Test the water temperature at different faucets and fixtures before using them. The actual water temperature may vary depending on the distance from the water heater, the flow rate, and the ambient temperature.
  • Educate yourself and your family members about the dangers of hot water and how to prevent scalding injuries. Children, elderly, and people with disabilities are more vulnerable to hot water burns and should be supervised when using hot water.