{"product_id":"icp-pressure-switch-for-wpg4304060lkb1-tubing-style-oem-1178417-ships-today-1","title":"ICP Pressure Switch for WPG4304060LKB1 — Tubing-Style OEM 1178417 | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThis is a genuine OEM tubing-style air pressure switch (part number 1178417) for the ICP\/Heil\/Tempstar WPG4304060LKB1 packaged gas furnace. The pressure switch is a critical safety control that verifies proper combustion airflow before the ignition sequence begins. It monitors negative pressure created by the inducer (draft) motor through a small length of tubing. When adequate draft is sensed, the normally-open contacts close and allow the control board to energize the igniter and gas valve. If the switch never closes — or opens during a heating cycle — the furnace locks out to prevent unsafe operation. A failed or drifting pressure switch is one of the most common causes of a furnace that cycles, short-cycles, or refuses to ignite.\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 Switch (Air-Proving)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eICP \/ Heil \/ Tempstar \/ Comfortmaker\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFunction\u003c\/td\u003e\n\u003ctd\u003eCombustion airflow \/ draft proving\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eContacts\u003c\/td\u003e\n\u003ctd\u003eSingle-pole, normally open\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFitment\u003c\/td\u003e\n\u003ctd\u003eOEM exact-fit for WPG4304060LKB1\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 OEM replacement for the ICP\/Heil\/Tempstar WPG4304060LKB1 packaged unit. This switch is also used across closely related WPG-series furnaces sharing the same inducer and venting assembly. Always confirm the part number stamped on your existing switch matches 1178417 before installing.\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 at the breaker and verify zero voltage with a multimeter before touching any wiring.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the furnace control\/blower access panel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph the wire terminals and the tubing connection before disconnecting anything.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Pull the spade terminals off the old switch, detach the rubber sensing tube, and remove the mounting screws.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Mount the new 1178417 switch, reconnect the tubing (no kinks), and reattach the wires per your photo.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power and start a heat call; confirm the inducer runs and the switch closes for normal ignition.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eFurnace inducer runs but the igniter never glows\u003c\/li\u003e\n\u003cli\u003eRepeated lockouts or flashing pressure-switch fault codes\u003c\/li\u003e\n\u003cli\u003eShort-cycling on the heating call\u003c\/li\u003e\n\u003cli\u003eSwitch fails a continuity\/closure test when 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":63027212747123,"sku":"1178417","price":38.94,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":63047705526643,"sku":"1178417-GEN","price":29.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-pressure-switch-single-1178417_b1572371-4488-4f52-9007-275ff3497781.jpg?v=1782895117","url":"https:\/\/nationalhvacparts.com\/products\/icp-pressure-switch-for-wpg4304060lkb1-tubing-style-oem-1178417-ships-today-1","provider":"National HVAC Parts","version":"1.0","type":"link"}