{"product_id":"icp-tubing-pressure-switch-for-wpg4484090lkb1-oem-1178417-ships-today-1","title":"ICP Tubing Pressure Switch for WPG4484090LKB1 — OEM 1178417 | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThis is a genuine OEM air pressure switch (part number 1178417) with integrated tubing for the ICP Tempstar Heil WPG4484090LKB1 packaged gas unit. The pressure switch is a safety device that confirms proper draft and combustion airflow through the inducer before the control board allows the gas valve to open and the igniter to fire. It monitors negative pressure created by the inducer motor through a small sensing tube. When airflow is correct, the switch closes and the ignition sequence proceeds; if the vent is blocked, the inducer is weak, or there is a condensate blockage, the switch stays open and locks out the furnace to prevent unsafe operation. Common failure symptoms include the inducer running but no ignition, repeated lockouts, or a furnace that short-cycles on call for heat.\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpec\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003e1178417\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eAir\/Draft Pressure Switch with Tubing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eICP (Tempstar \/ Heil)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFunction\u003c\/td\u003e\n\u003ctd\u003eInducer draft proving safety switch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncludes\u003c\/td\u003e\n\u003ctd\u003eSensing tubing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFit\u003c\/td\u003e\n\u003ctd\u003eOEM direct replacement\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cp\u003eDesigned as a direct-fit OEM replacement for the ICP Tempstar Heil WPG4484090LKB1 packaged gas furnace\/unit. ICP-built equipment is sold under multiple labels (Tempstar, Heil, Comfortmaker, Arcoaire), so this switch may also service equivalent models within that family. Verify the printed part number 1178417 on your existing switch before ordering.\u003c\/p\u003e\n\n\u003ch3\u003eInstallation Guide\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eSafety First\u003c\/strong\u003e — Disconnect power to the unit at the disconnect or breaker and verify zero voltage with a multimeter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the service\/control panel to expose the inducer assembly and pressure switch.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph all wire connections and the tubing routing before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Pull the spade terminals off the old switch, detach the sensing tube from the inducer port, and unscrew the mounting screws.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Mount the new switch, reconnect the tubing to the inducer port, and reattach the electrical terminals exactly as photographed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power, call for heat, and confirm the inducer starts and the switch closes to allow ignition.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eInducer motor runs but the unit never ignites.\u003c\/li\u003e\n\u003cli\u003eFurnace locks out or trips on a pressure\/draft fault code.\u003c\/li\u003e\n\u003cli\u003eCracked, kinked, or disconnected sensing tubing.\u003c\/li\u003e\n\u003cli\u003eSwitch fails a continuity test when proper draft is present.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eShipping \u0026amp; Returns\u003c\/h3\u003e\n\u003cp\u003eShips same day before 3 PM CST. 30-day returns. Backed by the National HVAC Parts fitment guarantee.\u003c\/p\u003e","brand":"ICP","offers":[{"title":"OEM","offer_id":63027208716659,"sku":"1178417","price":49.4,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":63047757627763,"sku":"1178417-GEN","price":38.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-pressure-switch-single-1178417_52b69372-b1db-4e41-845e-6e6f22a9fbbd.jpg?v=1782897028","url":"https:\/\/nationalhvacparts.com\/products\/icp-tubing-pressure-switch-for-wpg4484090lkb1-oem-1178417-ships-today-1","provider":"National HVAC Parts","version":"1.0","type":"link"}