Carrier HH18HA449 Rollout Switch Direct OEM Compatibility: Engineered as

Direct OEM Compatibility: Engineered as the exact replacement for ADFA-20 series pins to maintain system specifications

Ease of Installation: Standard 2-wire 10k ohm design allows for rapid field replacement during routine maintenance or emergency HVAC repair

This genuine Johnson Controls replacement part provides the exact tolerances required for industrial and commercial HVAC filtration maintenance

this thermistor ensures the unit maintains accurate setpoints by monitoring the air entering the evaporator coil

is a high-performance white port cartridge specifically engineered for thermostatic expansion valves (TEV)

Carrier HH18HA449 Rollout Switch Direct OEM Compatibility: Engineered asThe Carrier HH18HA449 Rollout Switch is a critical safety component designed to detect and respond to flame rollout conditions in gas fired furnaces. This genuine OEM part serves as the advanced replacement for the obsolete HH18HA350, ensuring full compatibility with a wide range of Carrier, Bryant, and Payne heating systems. Engineered as a Single Pole, Single Throw (SPST) switch, it features a factory calibrated trip point of 350 degrees F. When the