failing to protect the compressor from refrigerant migration and potentially leading to mechanical failure

While it uses a 30mV thermocouple for the safety pilot circuit

Coil the excess tubing carefully away from any electrical terminals or moving parts to avoid vibration damage or refrigerant leaks within the sensor bulb system

the ACH-CP-B is the official replacement for the ACH-CP-H and works on both Carrier-branded ABB ACH550 and ACS320 drives

Carrier HH18HA160 Temp Switch 324846-701 failing to protect the compressorThe Carrier HH18HA160 Temp Switch is a critical OEM limit switch designed for heavy duty thermal protection in commercial and residential HVAC systems. Engineered as a safety limit control, this genuine Carrier replacement part monitors the heat exchanger environment, automatically interrupting the burner circuit if temperatures exceed safe operating parameters. With a precise 160F cut out and a automatic 120F cut in reset, it prevents thermal stress