Heil Quaker ICP 1320331 Limit Switch Durable Construction: High-tensile positioner spring

Durable Construction: High-tensile positioner spring designed to withstand the cyclic stresses of HVAC pneumatic systems

The York S1-025-31883-000 Wiring Harness is a critical electrical interface specifically engineered for residential and light commercial compressor wiring harness applications

Check the secondary output with a multimeter

There is no functional difference between these parts

310664 is identical to 310664/U

Heil Quaker ICP 1320331 Limit Switch Durable Construction: High-tensile positioner springThe Heil Quaker ICP 1320331 Limit Switch is a critical OEM replacement part designed for precision temperature regulation in ICP furnaces and high performance HVACR systems. Engineered with a factory calibrated 120 160F temperature range, this auto limit switch functions as a primary safety control, monitoring the thermal environment of the heat exchanger. When temperatures reach the upper 160? F threshold, the contacts open to interrupt the burner