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OEM Compatibility: Exact fit for Armstrong Air heating systems
There is no functional or technical difference
As a veteran-grade HVAC thermostat accessory
it maintains OEM performance standards across a wide range of popular Classic and Simplicity series models
Heil Quaker ICP 1173637 Defrost Sensor OEM Compatibility: Exact fit forFor contractors servicing International Comfort Products (ICP) equipment, the Heil Quaker ICP 1173637 Defrost Sensor is the specific OEM replacement part required to restore accurate thermal monitoring in heat pump systems. This L65 33F defrost sensor is a critical thermistor based component that triggers the defrost cycle when the outdoor coil temperature drops to a calibrated 33F. Engineered for durability in extreme environments, it replaces