Most failures result from carbon tracking on the bushings or excessive electrode gaps

using this 440V unit for a 370V application)

reducing diagnostic callbacks during critical cooling cycles

The 370 VAC rating provides a necessary safety margin against the back-EMF generated by the motor windings

ensuring consistent performance in high-cycle environments

Carrier HH19ZH175 Limit Switch 320735-701 Most failures result from carbonAs 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