Carrier HH19ZH175 Limit Switch 322838-753 and HCG-150 models

and HCG-150 models

While installation is straightforward

For commercial reliability

offering superior thermal shock resistance and faster heat-up times

The flow arrow must point toward the expansion device

Carrier HH19ZH175 Limit Switch 322838-753 and HCG-150 modelsAs a field tech, you know that a failed safety circuit is the fastest way to a no heat call. The Carrier HH19ZH175 is a critical furnace high limit switch designed to protect the heat exchanger from thermal stress. This 175F limit switch features a normally closed (CO) configuration, meaning it stays shut during standard operation and opens the circuit at its 175 degree setpoint to kill the gas valve or heating elements. This specific HH19ZH175