Carrier HH18HA187 Limit Switch which protects the compressor and

which protects the compressor and heat exchanger from thermal stress

allowing it to withstand ambient temperatures up to 122°F while maintaining consistent magnetic flux

By capturing particulates and neutralizing harmful acids

ensuring long-term performance and UL Listed compliance for professional contractor installations

Carrier HH18HA187 Limit Switch which protects the compressor andThe Carrier HH18HA187 Limit Switch is a critical OEM replacement part designed for high limit safety monitoring in residential and commercial gas furnaces. This SPST normally closed disc style switch features a fixed 180 degree open setpoint and a 80 degree close reset point, ensuring the heat exchanger does not exceed safe operating temperatures. Engineered for automatic reset functionality, the HH18HA187 integrates seamlessly into the safety string