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Its internal relief valve (IRV) and 1" threaded vent provide exceptional overpressure protection
Legacy Compatibility: Designed as the official replacement for A19KNC-1
and HCG-150 models
We recommend retaining original hardware or sourcing high-grade corrosion-resistant fasteners for the install
Carrier HH19ZH175 Limit Switch 322838-753 Its internal relief valve (IRV)As 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
US$ 100.00
US$ 200.00