De Dietrich 95325103 unipolar double switch

The “Test STB” switch (safety thermostat) De Dietrich 95325103 is a genuine part integrated into the boiler control system. It activates the thermal protection test function, allowing you to verify the proper operation of the safety system under extreme temperature conditions. This feature is particularly useful for preventive maintenance against overheating or automation faults. The part is listed in the GT-220A assembly documentation as the “STB Test switch.” It is an essential component for service centers and engineers seeking to ensure the safety and reliability of the equipment. The De Dietrich 95325103 switch is installed on boilers GT 300, GT/GTM 110/1100 /Diematic, GT/GTM 210-2100 /K/DIEM./DIEM.MD, GT 400, DTG 350 NEZ/Diematic, GT/GTM 1100 V /Diematic, DTG 220 ECONOX/II, GTU 1100 V /Diematic ECONOX, DTG 210 NEZ, and GTU 110/1100 Diematic.