When performing routine maintenance or replacing a hot surface igniter

Built to withstand a maximum pressure of 250 psi

This specific model supports 2 stages of heat (typically compressor plus auxiliary heat) but only 1 stage of cooling

the sensor should be mounted vertically as indicated by the arrows on the enclosure

the switch may be failed open

Heil Quaker ICP 1171805 Pressure Switch 326010-701 When performing routine maintenance orThe Heil Quaker ICP 1171805 Pressure Switch is an essential OEM safety component designed for high pressure monitoring in residential and commercial HVAC systems. Engineered to protect the compressor and sealed system integrity, this high pressure switch features a precise Cut Out (C O) at 426 PSI and a Cut In (C I) at 320 PSI. As a genuine ICP replacement part, it ensures seamless compatibility with Heil, Tempstar, Comfortmaker, and KeepRite