it requires a 5 MFD / 370V capacitor for proper startup and run torque

reducing slippage and heat buildup

ensuring a secure and leak-resistant connection to the high-side refrigerant line

necessitating a new part to avoid damage to other heater control boards

Carrier HH19ZA175 Limit Switch 318172-701 it requires a 5 MFDThe Carrier HH19ZA175 Limit Switch is a critical safety component designed for precise thermal monitoring in residential and commercial HVAC equipment. Optimized for 125 VAC VDC systems, this normally closed (NC) limit actuator operates with a specific 175F open temperature and a 135F close temperature. Built as a Pro Dim high temperature switch, it effectively prevents heat exchanger damage by breaking the 24V control circuit if internal temperatures