it prevents internal heat exchanger temperatures from exceeding safe operational limits

Manual Reset Mechanism: Forced manual intervention ensures the root cause of the furnace overheating is addressed by a professional before the unit restarts

the unit must never be operated permanently without a functional B1370254 safety limit in place

or a failing run capacitor

Siemens Building Technology 184-113 Tee Restrictor it prevents internal heat exchangerFor veteran technicians managing legacy air systems, the Siemens Building Technology 184 113 Tee Restrictor is the critical component for maintaining precise branch pressure in one pipe pneumatic circuits. Engineered as a direct replacement for the 21 039, this 20 SCIM pneumatic restrictor ensures that bleed type controllers, such as one pipe thermostats and transmitters, function with the necessary backpressure for accurate modulation. Without the 0.