Bosch Tankless Water Heater Reset Button

Bosch Tankless Water Heater Reset Button

It’s freezing cold outside. To make things more worse, your Bosch Tankless Water Heater delivers no hot water as it throws an error code. 

Or, your tankless unit cuts off power to it by tripping its reset button. 

It doesn’t matter what the problem you are experiencing with the unit…

What matters most is- you can easily solve those issues by resetting the tankless water heater. But the heck is- you don’t know how to reset the Bosch Tankless Water Heater or the location of the reset button. 

And here, this guide on Bosch Tankless Water Heater Reset Button comes into play. This guide will help you in locating the reset button and the way you reset the tankless unit.

As a bonus, you will learn the culprits that cause the reset button to trip. So, let’s dive in without any further ado. 

Table of Contents

Where Is The Reset Button On Bosch Tankless Water Heater?

On Bosch Electric Tankless Water Heater, the reset buttons are located on the thermal cutouts on the top of each heating element. 

To access the reset buttons, you should turn off power to the unit and remove the front cover. Then, locate the thermal cutouts on the top of the heating modules. 

However, if you own a gas tankless unit from Bosch, the happy news is- you don’t need to look for reset buttons on the unit to reset the unit. It’s because the gas unit has no reset buttons. 

Anyway, you can still reset the unit by using the power (on/off) button. 

In the next chapter, I will show you the procedure to reset both the electric and the gas tankless unit. 

Bosch Tankless Water Heater Reset Button: The How-To Steps

Either you own an electric or a gas tankless water heater from Bosch, this chapter will take you through the step-by-step procedure to reset the unit.  

Resetting The Bosch Electric Tankless Water Heater:

  • Turn the power off to your water heater by flipping down all the circuit breakers connected to the unit.
  • Remove the front cover of the unit and find the thermal cutouts on the top of each heating module. 
  • Reset each thermal cutout by pressing down the red reset button located in the center of the cutout. And it will reset your water heater. 
  • Replace its front cover and restore the power to the water heater by turning on all the circuit breakers attached to the unit.

Resetting The Bosch Gas Tankless Water Heater:

Nothing is easier than resetting the gas tankless water heater from Bosch. What you need to do to reset the unit is- just hold down the power (on/off) button for 3 seconds and it will begin the start-up sequence. In short, it will reset your water heater. 

What Trips The Reset Button On A Hot Water Heater?

Overheating is the number one reason that causes the unit to trigger the reset button. 

Every water heater has a safety feature named thermal cutouts or resets. If the water temperature exceeds the safety limit aka 180 degrees Fahrenheit, the unit will cut-off the power by tripping the reset button. 

The unit will keep tripping the reset button until you resolve the cause of overheating. Generally, obstructions in the plumbing cause this issue. 

For example, restrictions in the water path like shower head, faucet aerators, and the filter screen of the unit will restrict the water flow through the water heater causing overheating. 

To resolve the overheating issue, ensure there is no obstruction in the shower heads, faucet aerators, and whole house filters. 

Of course, don’t forget to inspect the water heater’s inlet filter screen for blockage. Then, clean the inlet filter screen if needed.  

Besides, the Bosch Electric Tankless Water Heater will trip the reset button if you feed it with preheated water. It’s because this unit is designed for a cold water feed only.  

And lastly, inspect the heating elements for electric continuity if the thermal cutouts keep tripping. 


Why is my Bosch Water Heater Not Heating?

Your Bosch Water Heater won’t heat due to the following reasons: 

  • The water heater is not getting any power
  • Defective fuse in the control board
  • A clogged inlet water filter screen
  • Obstructions in the water paths
  • Plumbing crossover

If you want to resolve those issues to make your unit ready for heating water, check out this guide on Bosch Tankless Water Heater Won’t Igniter. In that article, I explained everything to fix the heating issue.

Why is my Bosch Tankless Water Heater not turning on?

Bosch Tankless Water Heater won’t turn on if it gets no power or the circuit breakers connected to the unit are off. Turns out, low water pressure or water flow, problems with the home’s electrical wiring, or internal wiring issues of the unit are responsible for the unit not turning on. 

Does a water heater have two reset buttons?

It depends on what type of water heater you own. For example, a tank electric water heater has only a reset button. On the other hand, a tank water heater operated by gas has no reset button. 

Besides, not every tankless water heater has reset buttons. You can take the gas operated Bosch Tankless water heater as an example. It has no reset buttons. On the flip side, Bosch Electric Tankless Water Heater has two safety resets.


You don’t need to be a plumbing nerd to reset your Bosch Tankless Water Heater. 

If you own a gas operated Bosch Tankless Unit, just hold down the On/Off button for 3 seconds and it will reset your water heater by beginning the start-up sequence. 

On the other hand, just turn the power off the unit, remove the cover, and locate the reset buttons on the top of each safety cut out. Then, press the button to reset your water heater.

It’s simple…

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