{"product_id":"icp-tubing-pressure-switch-for-wpg3304040lkc1-oem-1178417-ships-today","title":"ICP Tubing Pressure Switch for WPG3304040LKC1 — OEM 1178417 | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\u003cp\u003eThis genuine OEM tubing pressure switch (part #1178417) is the safety device that proves proper draft on the ICP\/Heil\/Tempstar WPG3304040LKC1 packaged unit. Before the control board allows the igniter and gas valve to energize, the inducer motor must pull a vacuum that closes this pressure switch through its sensing tube. This confirms the venting is clear and combustion gases can safely exhaust. A failed switch, a cracked tube, or a clogged port will stop the ignition sequence cold — the inducer runs but the burners never light. Replacing the switch with the correct factory part restores safe, reliable furnace operation.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\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\u003eTubing Pressure \/ Draft Switch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eICP \/ Heil \/ Tempstar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eControl Voltage\u003c\/td\u003e\n\u003ctd\u003e24V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFunction\u003c\/td\u003e\n\u003ctd\u003eCombustion Draft Proving\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\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eDirect-fit replacement for the ICP unit WPG3304040LKC1 and the shared Heil, Tempstar, Comfortmaker, and Keeprite chassis. Confirm part number 1178417 and the original switch trip setpoint before ordering.\u003c\/p\u003e\u003ch3\u003eInstallation Guide\u003c\/h3\u003e\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eSafety First\u003c\/strong\u003e — Disconnect power at the breaker and disconnect; verify zero voltage with a multimeter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the control\/burner access panel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph the two spade terminals and the sensing tube routing before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Pull the wire terminals, slip off the rubber tube, and remove the mounting screws.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Mount the new switch, reattach the tube without kinks, and reconnect the terminals per your photo.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power and run a heat cycle; confirm the inducer pulls the switch closed and the burners light.\u003c\/li\u003e\n\u003c\/ol\u003e\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eInducer motor runs but burners never ignite\u003c\/li\u003e\n\u003cli\u003eFurnace locks out with a pressure-switch fault code\u003c\/li\u003e\n\u003cli\u003eSwitch fails a continuity test once the inducer is at full draft\u003c\/li\u003e\n\u003cli\u003eCracked, brittle, or disconnected sensing tube\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eShipping \u0026amp; Returns\u003c\/h3\u003e\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":63021533790579,"sku":"1178417","price":37.64,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":63047755530611,"sku":"1178417-GEN","price":28.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-pressure-switch-single-1178417_9a386968-ceb5-4315-94db-5588123a1727.jpg?v=1782896943","url":"https:\/\/nationalhvacparts.com\/products\/icp-tubing-pressure-switch-for-wpg3304040lkc1-oem-1178417-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}