{"product_id":"icp-pressure-switch-for-wpg3604090lkc1-tubing-air-proving-switch-ships-today","title":"ICP Pressure Switch for WPG3604090LKC1 — Tubing Air Proving Switch | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThis OEM tubing pressure switch is the safety device that proves proper draft before your ICP \/ Tempstar \/ Heil WPG3604090LKC1 packaged gas unit is allowed to ignite. When the inducer motor starts, it creates a negative pressure that the switch senses through its connected tubing; only when adequate draft is confirmed does the switch close and permit the control board to energize the igniter and gas valve. This prevents the furnace from firing with a blocked vent or failed inducer. A stuck, drifted, or clogged pressure switch — or one with cracked\/blocked tubing — will keep the contacts open and lock the furnace out of heating. This part replaces OEM 1178417 (Tubing Pressure Switch).\u003c\/p\u003e\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-Proving 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\u003eDraft \/ Inducer Proving Safety\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFitment\u003c\/td\u003e\n\u003ctd\u003eOEM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cp\u003eDirect OEM replacement for the ICP Tempstar Heil WPG3604090LKC1 packaged gas\/electric unit and related ICP-built brands including Comfortmaker, Arcoaire, KeepRite and Day \u0026amp; Night. Match the switch pressure rating (in. w.c.) and tubing\/port configuration to your existing part before installing.\u003c\/p\u003e\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 access panel to reach the pressure switch near the inducer assembly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph the wire spade positions and tubing routing before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Pull the spade terminals, detach the rubber tubing, and unscrew the switch from its bracket.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Mount the new switch, reconnect the tubing securely, and reattach the wires per your photo.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power, call for heat, and confirm the switch closes after the inducer starts and the furnace ignites normally.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eFurnace inducer runs but the unit never ignites\u003c\/li\u003e\n\u003cli\u003eControl board flashes a pressure-switch or open-circuit fault code\u003c\/li\u003e\n\u003cli\u003eSwitch fails to close or stays stuck closed when checked with a meter\u003c\/li\u003e\n\u003cli\u003eCracked, brittle, or condensate-blocked sensing tubing\u003c\/li\u003e\n\u003c\/ul\u003e\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":63021523960179,"sku":"1178417","price":37.7,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":63047704904051,"sku":"1178417-GEN","price":29.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-pressure-switch-single-1178417_4dfe4f3b-fc5b-408e-97be-da1a1c7f5c7f.jpg?v=1782895073","url":"https:\/\/nationalhvacparts.com\/products\/icp-pressure-switch-for-wpg3604090lkc1-tubing-air-proving-switch-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}