How to Replace the Thermo-Button on a Steam Plant

Aug 03, 2023, 14:23pm

The thermo-button of the steam generator is an essential part for the proper functioning of the appliance. It triggers the heating process of the steam generator, which then triggers the production of steam.

Replace the thermo button if the steam generator no longer activates the boiler.

The thermo-button of the steam generator is a simple button located on the outside of the device, at the back, near the power cord.

A thermo-button, also known as a thermal cut-off switch or a thermal fuse, is a crucial component of a steam plant. It functions as a safety device that disconnects power to the heating element when temperatures exceed a specific limit, preventing potential damage or hazardous situations. Occasionally, these components may fail and need to be replaced. This article will guide you through the step-by-step process of changing a thermo-button on a steam plant.

How to Replace the Thermo-Button on a Steam Plant

1. Safety First

Safety should always be your top priority when working with machinery. Ensure that the steam plant is turned off and disconnected from the power supply to avoid accidental activation or electric shock. Personal protective equipment (PPE), including safety glasses and gloves, should be worn to protect yourself from potential harm.

2. Locate the Thermo-Button

The thermo-button’s location can vary depending on the specific model and make of your steam plant. In most cases, it is typically situated near the heating element or boiler. If you struggle to locate it, refer to your steam plant’s user manual or schematic diagram for assistance.

3. Remove the Old Thermo-Button

Once the thermo-button is located, the next step is to remove it. This generally involves disconnecting the electrical connections to the thermo-button. Remember to take a photo or make a note of the connection points to assist in installing the new thermo-button. After the electrical connections are safely disconnected, you can remove the thermo-button from its mount.

4. Install the New Thermo-Button

Take the new thermo-button and secure it in the mount where the old one was located. Ensure that it is firmly attached and in the correct position. Refer to the manufacturer’s instructions for any specific mounting requirements.

How to Replace the Thermo-Button on a Steam Plant

5. Reconnect the Electrical Connections

Using the photo or notes you took earlier, reconnect the electrical connections to the new thermo-button. This step is critical as incorrect wiring could cause the thermo-button or the steam plant to malfunction. Ensure all connections are secure.

6. Test the New Thermo-Button

With the new thermo-button installed, it’s time to test the system. Reconnect the power supply and turn on the steam plant. Carefully monitor the operation of the steam plant and pay attention to the functioning of the thermo-button. If the steam plant operates normally and shuts off when it reaches its temperature limit, the thermo-button replacement has been successful.


While this guide provides a general approach to changing a thermo-button on a steam plant, it’s important to remember that specifics can vary based on the exact model of your steam plant and the type of thermo-button used. Always refer to your owner’s manual or consult with a professional if you’re unsure. Regular maintenance and timely replacement of parts like the thermo-button not only ensures the safe operation of your steam plant but also enhances its lifespan and efficiency.