When it comes to coffee makers, replacing the thermostat switches couldn’t be easier.  In this article, you will discover how our snap disc and capillary thermostats can be used as replacements and a few tips on how to repair your coffee maker. Keep in mind, the size and price of your coffee maker will make a difference on which controls are used. Contact us for help with finding the correct thermostat switch.

Types of Coffee Maker Thermostats

432 Manual Reset Thermal Switch - Surface Mount

Snap Disc Thermostat

Most coffee makers have two control systems. The first of the control systems is either a snap disc thermostat or a capillary thermostat in charge of controlling the heating element. A snap disc thermostat is normally found in household coffee makers and has a fixed temperature setting and is normally the least expensive option.  A capillary thermostat on the other hand has an adjustable temperature range and is commonly found in larger industrial coffee makers.


Capillary Thermostat Switch

Capillary Thermostat

The second type of control system is the high limit. The high limit prevents your coffee maker from burning up when it runs out of liquids, or if the heater were to malfunction.  The high limit control is typically a Snap Disc thermostat or a Thermal Fuse. If the temperature becomes too high for the unit to withstand, the Snap Disc or Thermal Fuse will open the incoming power control circuit and turn of the equipment. Keep in mind, some newer units may be using a digital thermostat instead of a Snap Disc or Capillary Thermostat.


How to Test if your Coffee Maker’s Snap Disc Needs To Be Replaced

IMPORTANT: Always be sure the unit is unplugged and there is no power going to the coffee maker. The unit should be cooled down before attempting any information in this article.

Testing your coffee maker to see if the high limit has been reached is actually pretty simple.

  • First, unplug the unit from the incoming power,
  • Remove the wires from the thermostat.
  • Run a continuity test across the terminals on the high limit.

If you notice that you do not get a light, that indicates that the circuit is open which indicates that the high limit has been set off.

Most coffee makers have a one-shot snap disc thermostat and once the high limit is hit, it will need to be replaced. However, a higher priced unit might have a snap disc thermostat that is a manual reset. In this case, all you need to do is push the reset button.

Contact our technical support today!


The superior controls manufactured by Senasys have a history of solid performance in many industries. From 22.5 mm selectors, to the four quadrant lighted feedback CMC controls, almost any switching need can be, and has been utilized in a variety of applications. Select a group below for more information. When you have found a switch that fits your needs, simply fax or email your specs to us and let our highly trained engineers find the most efficient configuration for your applications.

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Senasys products are designed & manufactured to meet the needs of original equipment manufacturers worldwide.

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Senasys products are designed & manufactured in Eau Claire, Wisconsin, U.S.A.