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provided the inlet pressure does not exceed the 5 PSI rating
testing the continuity of the limit switch is the standard diagnostic step
this component is essential for protecting scrolls and reciprocating compressors in cold-weather environments and low-ambient cooling applications
This is typically a 12k ohm NTC thermistor
When troubleshooting infrared heater ignition failure
Carrier HH18HV170 Limit Switch Els PW 17895 provided the inlet pressure doesThe Carrier HH18HV170 Limit Switch is a critical safety component designed for precise thermal regulation in Carrier, Bryant, and Payne heating systems. This OEM replacement part features a normally closed (NC) configuration, engineered to open on temperature rise at 170F and automatically reset when the system cools to 140F. Built with a snap action disc mechanism, the high limit switch ensures a rapid and reliable electrical break to prevent heat
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