Boiler contact thermostat LF 3444246

A contact thermostat controls the final rinse temperature in commercial dishwashers and glasswashers by opening or closing an electrical circuit when the water reaches the set point. In a professional machine, this point is typically 100 °C, the temperature needed to sanitise crockery, cutlery and glassware without chemical additives. The thermostat sits in the rinse line, sensing the water as it flows past. When the water hits 100 °C, the thermostat trips, cutting power to the heating element and stopping further rise. As the water cools below the set point, the circuit closes again, restarting the heater. This cycle repeats until the programme ends, ensuring every load is rinsed at the correct temperature for hygiene and drying.

To use the thermostat, the engineer fits it into the designated port on the dishwasher's rinse manifold, securing it with the thread or clip the machine provides. Electrical connections are made to the control board, matching the terminals marked on the thermostat. Once fitted, the machine is powered on and a rinse cycle started. The operator monitors the rinse temperature on the machine's display or gauge; if the temperature stabilises at 100 °C, the thermostat is functioning. No further adjustment is needed, as the set point is fixed at 100 °C for this model.

The thermostat is a sealed unit with a brass or stainless-steel body and a capillary tube that carries the temperature-sensitive fluid to the contact mechanism. The construction is designed for continuous exposure to hot water and steam, resisting corrosion and scale build-up that would affect accuracy.

This contact thermostat fits a wide range of professional dishwashers, glasswashers and cupwashers from AFI, HILTA, IME OMNIWASH, NOSEM and SAB ITALIA. The list of compatible models includes under-counter, hood-type and pass-through machines, covering most configurations found in commercial kitchens, bars and cafés.

In the catalogue, the thermostat is listed under dishwasher spare parts, specifically temperature controls.