{"product_id":"york-s1-025-53193-000","title":"York S1-025-53193-000 Flame Sensor","description":"\u003cp\u003eThe \u003cstrong\u003eYork S1-025-53193-000 Flame Sensor\u003c\/strong\u003e is the \u003cstrong\u003eOEM flame rectification sensor\u003c\/strong\u003e with a \u003cstrong\u003e90-degree bend\u003c\/strong\u003e used on \u003cstrong\u003eYork gas furnaces\u003c\/strong\u003e, sold under York's \u003cstrong\u003eSource 1\u003c\/strong\u003e replacement-parts numbering. It is the part that tells the furnace the burners are actually lit. Once the \u003cstrong\u003ehot surface igniter\u003c\/strong\u003e lights the burners, the \u003cstrong\u003eignition control board\u003c\/strong\u003e applies a small AC voltage to the \u003cstrong\u003eflame rod\u003c\/strong\u003e; the flame conducts that current and rectifies it into a \u003cstrong\u003eDC microamp signal\u003c\/strong\u003e that travels back through the \u003cstrong\u003eburner ground\u003c\/strong\u003e. As long as the board sees that signal it keeps the \u003cstrong\u003egas valve\u003c\/strong\u003e open. If the signal is weak or missing, the board shuts the gas valve within seconds, retries, and eventually goes to \u003cstrong\u003elockout\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eConstruction.\u003c\/strong\u003e The sensor in the photo is a straight \u003cstrong\u003emetal flame rod\u003c\/strong\u003e passing through a white \u003cstrong\u003eceramic insulator\u003c\/strong\u003e, with a flat steel \u003cstrong\u003emounting flange\u003c\/strong\u003e that has a single \u003cstrong\u003emounting hole\u003c\/strong\u003e for the burner bracket screw, and a male \u003cstrong\u003equick-connect spade terminal\u003c\/strong\u003e bent \u003cstrong\u003e90 degrees\u003c\/strong\u003e off the ceramic body so the wire lead drops cleanly past the burner box. The ceramic isolates the rod electrically from the bracket, so the only path for the flame signal is the rod, the flame, and the burner ground. York flame sensors are not all the same length or shape, so this number should be matched to the \u003cstrong\u003eS1-025-53193-000\u003c\/strong\u003e printed or listed for your furnace rather than to a generic universal rod.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eSymptoms and testing.\u003c\/strong\u003e The classic sign of a bad or fouled flame sensor is a furnace that lights, runs for a few seconds, shuts off, and then repeats the sequence before locking out with a \u003cstrong\u003eflame fault\u003c\/strong\u003e code. Before replacing the part, shut off power and gas, remove the sensor, and look for \u003cstrong\u003ecarbon or oxide buildup\u003c\/strong\u003e, pitting, or a \u003cstrong\u003ecracked ceramic\u003c\/strong\u003e. A light pass with a \u003cstrong\u003efine abrasive pad\u003c\/strong\u003e restores a lightly fouled rod, but a thinned, bent or cracked sensor should be replaced. Measure the \u003cstrong\u003eflame current in microamps\u003c\/strong\u003e with the furnace running, confirm the \u003cstrong\u003eburner ground\u003c\/strong\u003e and the terminal connection are tight, and reinstall the new sensor in the same position as the original so the rod sits in the flame path without touching a burner.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eKey Benefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eOEM York Source 1 Part:\u003c\/strong\u003e The same \u003cstrong\u003eS1-025-53193-000\u003c\/strong\u003e sensor the furnace shipped with, so rod position and flame signal match the factory design.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eRestores Reliable Ignition:\u003c\/strong\u003e A clean, intact \u003cstrong\u003eflame rod\u003c\/strong\u003e ends the light-run-shutdown cycle and \u003cstrong\u003eflame lockout\u003c\/strong\u003e that a failed sensor causes.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCeramic-Insulated Rod:\u003c\/strong\u003e The \u003cstrong\u003eceramic insulator\u003c\/strong\u003e and steel \u003cstrong\u003emounting flange\u003c\/strong\u003e keep the flame signal isolated from the burner bracket.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eQuick-Connect Terminal:\u003c\/strong\u003e The \u003cstrong\u003e90-degree spade terminal\u003c\/strong\u003e pushes onto the existing lead, so the swap is a one-screw, one-wire job.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eCommon Questions\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eWhat does a flame sensor do?\u003c\/strong\u003e It proves the burner flame is present by passing a \u003cstrong\u003emicroamp rectified current\u003c\/strong\u003e through the flame back to the \u003cstrong\u003eignition control\u003c\/strong\u003e, which holds the \u003cstrong\u003egas valve\u003c\/strong\u003e open only while that signal is present.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCan I clean the old sensor instead?\u003c\/strong\u003e A lightly fouled \u003cstrong\u003eflame rod\u003c\/strong\u003e often recovers with a fine abrasive pad. If the rod is pitted or thinned, or the \u003cstrong\u003eceramic\u003c\/strong\u003e is cracked, replace it with the \u003cstrong\u003eS1-025-53193-000\u003c\/strong\u003e.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eHow do I confirm this is the right sensor?\u003c\/strong\u003e Match the York number on your original sensor and furnace parts list to \u003cstrong\u003eS1-025-53193-000\u003c\/strong\u003e, and compare the \u003cstrong\u003e90-degree terminal\u003c\/strong\u003e and mounting flange to the photo.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eDisclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.\u003c\/p\u003e","brand":"York","offers":[{"title":"Default Title","offer_id":67651485466802,"sku":"S1-025-53193-000","price":17.44,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/files\/image_6a9e316f-8f2e-4c75-816e-c771fd4d8ca4.jpg?v=1791401421","url":"https:\/\/www.gsistore.com\/products\/york-s1-025-53193-000","provider":"GSIstore","version":"1.0","type":"link"}