Warewasher Thermostat and Limit Controls

Maintaining accurate water temperature is critical in commercial warewashers to ensure consistent cleaning, sanitation, and equipment protection. Warewasher thermostat and limit controls regulate heating elements and safeguard machines from overheating, providing the performance and safety demanded in busy foodservice environments.

Bulb and Capillary Thermostats for Warewashers

Stemco Bulb and Capillary Thermostats are mechanical temperature controls that use fluid expansion to trigger a switch. Each device includes:

• Temperature sensor – a bulb placed in contact with water near the heating element

• Capillary tube – transmits fluid pressure to the control unit

• Diaphragm – converts pressure into mechanical movement

• Switch mechanism – opens or closes the electrical circuit

In warewashers, capillary thermostats may act as:

• Temperature controls – cycling the heating element to hold water within a set range

• High-limit devices – shutting off power if water temperature rises above a safe threshold

Their mechanical design offers precise response without software or calibration, and they resist moisture, vibration, and electrical noise common in dishroom environments. This durability makes them well suited for continuous use in commercial dish machines.

→ Find out more about capillary thermostats for warewashers

Snap Disc Thermostat Limit Switches in Dishwashers

Senasys Snap Disc Thermostats provide another reliable method of temperature control and overheat protection. Installed near the base of the tub or next to the heating element, they use a bimetal disc that snaps open or closed in response to temperature changes.

These controls are commonly:

• Calibrated to trip between 190°F and 200°F

• Available in automatic or manual reset models

• Designed to withstand the high heat and moisture inside dishwashers

Depending on the application, snap disc switches can maintain operating temperatures or function strictly as safety cutoffs. When replacement is needed, they are low-cost, easy to install, and restore full operation quickly.

→ Discover additional information about dishwasher snap disc limit switches

Both capillary thermostats and snap disc thermostat limit switches by Senasys serve as essential warewasher thermostat and limit controls. They can be configured either to maintain precise operating temperatures or to act as critical safety cutoffs, protecting dish machines from overheating. By combining accuracy with mechanical reliability, these controls keep commercial warewashers running safely, efficiently, and in compliance with sanitation standards.

→ Contact us today to discuss warewasher thermostat and limit controls