How do I test the 1171981 switch for continuity

This yellow-coded thermistor provides real-time thermal resistance feedback to the control board to prevent compressor overheating and liquid slugging

providing a rugged

With the power disconnected and the wires removed

Heil Quaker ICP 1171449 Flame Sensor How do I test theThe Heil Quaker ICP 1171449 Flame Sensor is a critical OEM replacement component designed for high performance flame rectification in International Comfort Products (ICP) residential and commercial heating units. For technicians troubleshooting a furnace short cycling or ignition failure, this genuine ICP flame rod provides the precise feedback signal required by the integrated furnace control to maintain the gas valve circuit. Modern HVAC flame