{"product_id":"oem-lennox-indoor-coil-sensor-18u32","title":"OEM Lennox Indoor Coil Sensor — 18U32","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e18U32\u003c\/strong\u003e indoor coil sensor (thermistor, ref. 11201007003445) monitors the temperature of your evaporator coil and reports it to the system control board. Accurate coil-temperature feedback lets your Lennox unit manage defrost cycles, prevent coil freeze-ups, and modulate operation for peak efficiency and comfort.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e When the \u003cstrong\u003e18U32\u003c\/strong\u003e sensor drifts or fails, you may see erratic cooling or heating, a frozen indoor coil, short cycling, improper defrost behavior, or fault\/error codes on the control board pointing to a coil-temperature sensor reading out of range.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e This sensor is calibrated to the exact resistance curve the Lennox control board expects. A generic thermistor with a different temperature-resistance profile feeds inaccurate readings to the board, causing false faults and poor performance. Installing the OEM \u003cstrong\u003e18U32\u003c\/strong\u003e guarantees correct calibration, a proper connector fit, and reliable communication with your Lennox system — keeping diagnostics accurate and your equipment protected.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081132556659,"sku":"LNX-18U32","price":249.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-indoor-coil-sensor-18u32","provider":"National HVAC Parts","version":"1.0","type":"link"}