Carrier 338085-408 Limit Switch 30067439-890 An open limit switch typically

An open limit switch typically breaks the circuit to the gas valve

Operating as a stainless steel rod encased in high-grade porcelain

The Carrier EA03PC503 is a high-capacity 16-ton thermal expansion valve (TXV) designed for precise refrigerant metering in large-scale commercial and industrial HVACR systems

This is an exposed pneumatic actuator designed for indoor mechanical room environments

Its dual-voltage capability (208-230/460V) and NEMA 56 frame design with a 7/8-inch shaft ensure it drops directly into standard mounts

Carrier 338085-408 Limit Switch 30067439-890 An open limit switch typicallyAs a field technician, you know that a tripped main limit switch is often the only thing standing between a standard service call and a heat exchanger failure. The Carrier 338085 408 is a factory authorized L210 20F limit switch, engineered specifically for high limit thermal protection in Carrier, Bryant, and Payne furnaces. This OEM HVAC replacement part features a normally closed circuit that opens precisely at 210F to interrupt the gas valve