the internal disc is likely defective and requires replacement

As a veteran-grade HVAC flame rollout limit

utilizing a single bimetal sensing element to ensure consistent thermal monitoring and responsive climate control

Designed to handle a maximum inlet pressure of 400 PSI

This 2-1/2" face unit provides clear visual feedback of pressure signals from remote transmitters

Carrier 346040-75103 Drain Pan 320074-702 the internal disc is likelyThe Carrier 346040 75103 Drain Pan is a critical engineering component designed for high efficiency moisture management within HVAC condensate systems. As a veterans choice for evaporator coil maintenance, this condensate drain pan is engineered to withstand the rigorous thermal cycling common in modern air handlers. This specific model serves as the factory authorized direct replacement for 322838 753 and 332106 711, ensuring a seamless fit without