{"product_id":"icp-tubing-pressure-switch-for-wpg3304040rkc1-oem-ships-today","title":"ICP Tubing Pressure Switch for WPG3304040RKC1 — OEM | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThis genuine OEM tubing pressure switch (part number 1178417) is the safety\/air-proving switch for the ICP \/ Tempstar \/ Heil WPG3304040RKC1 packaged furnace. It senses the negative pressure created by the inducer (draft) motor through its sensing tubing and proves that venting and combustion airflow are present before the control board allows the igniter and gas valve to energize. If the switch sticks, leaks, or its tubing clogs, the furnace will not advance past pre-purge and will lock out on a pressure fault — a critical safety interlock that prevents firing without proper venting. Installing the correct OEM switch restores reliable ignition sequencing while keeping the safety function intact.\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\u003eTubing Pressure \/ Air-Proving Switch\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\u003eProves inducer draft before ignition\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFits Model\u003c\/td\u003e\n\u003ctd\u003eWPG3304040RKC1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cp\u003eBuilt for the ICP WPG3304040RKC1 and shared across many Tempstar, Heil, Comfortmaker, and Day \u0026amp; Night packaged gas furnaces using this tubing-style pressure switch. Confirm the pressure set point and port\/tubing configuration match your original switch.\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 and verify zero voltage with a multimeter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the service panel to reach the pressure switch near the inducer assembly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph the electrical leads and the sensing tubing routing before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Pull the spade terminals, slip off the sensing tube, and unscrew the old switch from its bracket. Inspect the tubing and ports for soot or condensate blockage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Mount the new switch, reattach the tubing with no kinks, and reconnect the leads per your photo.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power, start a heat cycle, and confirm the switch closes on inducer start-up and the furnace lights normally.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eFurnace locks out on a pressure-switch fault code\u003c\/li\u003e\n\u003cli\u003eInducer runs but ignition never begins\u003c\/li\u003e\n\u003cli\u003eSwitch contacts stick open or closed when tested\u003c\/li\u003e\n\u003cli\u003eIntermittent no-heat that clears on reset\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":63021533430131,"sku":"1178417","price":42.84,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":63047755628915,"sku":"1178417-GEN","price":32.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-pressure-switch-single-1178417_6d0b688f-97d6-4ca4-9c66-5e578e321fc2.jpg?v=1782896948","url":"https:\/\/nationalhvacparts.com\/products\/icp-tubing-pressure-switch-for-wpg3304040rkc1-oem-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}