{"product_id":"trane-is20464-6223","title":"Trane IS20464-6223 Pressure Switch","description":"\u003cp\u003eThe \u003cstrong\u003eTrane IS20464-6223 Pressure Switch\u003c\/strong\u003e is a factory \u003cstrong\u003eOEM SPDT (single-pole, double-throw) pressure switch\u003c\/strong\u003e used as the \u003cstrong\u003edraft-proving and airflow-proving safety control\u003c\/strong\u003e on \u003cstrong\u003eTrane gas furnaces\u003c\/strong\u003e. It is the current Trane replacement for the older \u003cstrong\u003eD345654P01\u003c\/strong\u003e switch, and distributors also catalog it under the Trane service number \u003cstrong\u003eSWT03924\u003c\/strong\u003e, so a search by any of the three numbers lands on the same part. Inside the molded housing a \u003cstrong\u003eflexible diaphragm\u003c\/strong\u003e senses the pressure difference the \u003cstrong\u003einducer draft motor\u003c\/strong\u003e creates and moves a \u003cstrong\u003esnap-acting contact set\u003c\/strong\u003e. That contact change tells the \u003cstrong\u003eintegrated furnace control board\u003c\/strong\u003e that combustion air is moving and the vent path is clear, so the board is allowed to continue to \u003cstrong\u003eignition and gas valve operation\u003c\/strong\u003e. If the switch does not close on a call for heat, the furnace will not fire — which is exactly what a safety control is built to do.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eRatings and construction.\u003c\/strong\u003e Distributor data for this switch lists \u003cstrong\u003eSPDT snap-acting contacts\u003c\/strong\u003e rated \u003cstrong\u003e28 VA pilot duty at 24 VAC\u003c\/strong\u003e and \u003cstrong\u003e125 VA pilot duty at 120 VAC\u003c\/strong\u003e, an operating temperature range of \u003cstrong\u003e-40°F to 190°F\u003c\/strong\u003e, and \u003cstrong\u003e1\/4 inch quick-connect spade terminals\u003c\/strong\u003e. The switch in the photo has a light-gray \u003cstrong\u003emolded cover\u003c\/strong\u003e with port positions and a \u003cstrong\u003eP2\u003c\/strong\u003e marking on the face, a black \u003cstrong\u003ediaphragm base\u003c\/strong\u003e, a single \u003cstrong\u003ebarbed hose connection\u003c\/strong\u003e at the bottom edge, a brass-colored \u003cstrong\u003equick-connect terminal\u003c\/strong\u003e on the body, and a factory barcode label reading \u003cstrong\u003e83232687\u003c\/strong\u003e. Because the contacts are \u003cstrong\u003eSPDT\u003c\/strong\u003e, the switch provides a common terminal with both a \u003cstrong\u003enormally open\u003c\/strong\u003e and a \u003cstrong\u003enormally closed\u003c\/strong\u003e path; land each wire on the same terminal the original switch used and the furnace control will see exactly the signal it expects.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDiagnosing before you replace.\u003c\/strong\u003e A furnace that starts the inducer and then sits without lighting, or one that flashes a \u003cstrong\u003epressure switch fault code\u003c\/strong\u003e, does not always have a bad switch. Check the \u003cstrong\u003event pipe and combustion-air path\u003c\/strong\u003e for blockage, confirm the \u003cstrong\u003einducer motor\u003c\/strong\u003e is at full speed with a clean wheel, inspect the \u003cstrong\u003evacuum hose\u003c\/strong\u003e for cracks, pinches or trapped condensate, and on condensing models verify the \u003cstrong\u003econdensate trap and drain\u003c\/strong\u003e are clear. With the inducer running, read the pressure at the switch with a \u003cstrong\u003edigital manometer\u003c\/strong\u003e and check continuity across the contacts with a meter; if the draft is good and the contacts stay open, the switch has failed. Never jumper a pressure switch to force a furnace to run — that defeats the safety. Remove power first, replace brittle hose at the same time, and match the replacement to the number on your original switch, since Trane uses several pressure switches with different set points.\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 Trane Safety Control:\u003c\/strong\u003e The same \u003cstrong\u003eSPDT snap-acting\u003c\/strong\u003e design the furnace was built around, so the \u003cstrong\u003edraft-proving\u003c\/strong\u003e function behaves the way the control board expects.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePilot-Duty Rated Contacts:\u003c\/strong\u003e \u003cstrong\u003e28 VA at 24 VAC\u003c\/strong\u003e and \u003cstrong\u003e125 VA at 120 VAC\u003c\/strong\u003e pilot duty, with an operating range of \u003cstrong\u003e-40°F to 190°F\u003c\/strong\u003e for cold garage and attic installs.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDirect Replacement for D345654P01:\u003c\/strong\u003e Supersedes the older \u003cstrong\u003eD345654P01\u003c\/strong\u003e, and is listed under \u003cstrong\u003eSWT03924\u003c\/strong\u003e as well, which makes the cross-reference simple.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eQuick-Connect Wiring:\u003c\/strong\u003e \u003cstrong\u003e1\/4 inch spade terminals\u003c\/strong\u003e and a \u003cstrong\u003ebarbed hose connection\u003c\/strong\u003e make the swap a quick, tool-light 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 this switch replace?\u003c\/strong\u003e It is the replacement for the Trane \u003cstrong\u003eD345654P01\u003c\/strong\u003e pressure switch and is cataloged by distributors as \u003cstrong\u003eSWT03924\u003c\/strong\u003e and \u003cstrong\u003eIS20464-6223\u003c\/strong\u003e.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eWhat are the electrical ratings?\u003c\/strong\u003e \u003cstrong\u003eSPDT\u003c\/strong\u003e snap-acting contacts rated \u003cstrong\u003e28 VA pilot duty at 24 VAC\u003c\/strong\u003e and \u003cstrong\u003e125 VA pilot duty at 120 VAC\u003c\/strong\u003e, with a \u003cstrong\u003e-40°F to 190°F\u003c\/strong\u003e operating range.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eHow do I know if it is the switch or the hose?\u003c\/strong\u003e With the inducer running, compare the manometer reading at the switch to the original set point and check continuity across the contacts. Good draft with open contacts means a failed switch; low draft usually points to a blocked vent, a plugged hose or a weak \u003cstrong\u003einducer\u003c\/strong\u003e.\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":"Trane","offers":[{"title":"Default Title","offer_id":67651484450994,"sku":"IS20464-6223","price":65.76,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/files\/image_c4ceb35b-f499-45f7-b94b-4e59023a39b0.jpg?v=1791401336","url":"https:\/\/www.gsistore.com\/products\/trane-is20464-6223","provider":"GSIstore","version":"1.0","type":"link"}