{"product_id":"icp-pressure-switch-for-wpg4424090rkb1-furnace-air-proving-safety-ships-today","title":"ICP Pressure Switch for WPG4424090RKB1 — Furnace Air-Proving Safety | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThis OEM pressure switch assembly with tubing (OEM 1178417) is the combustion-airflow safety on the ICP WPG4424090RKB1 packaged gas\/electric unit. The switch senses the negative pressure created by the draft inducer; only when it proves adequate venting will it close and allow the control board to energize the igniter and gas valve. This prevents the furnace from firing if the flue is blocked or the inducer is weak. A failed switch — or a cracked, clogged, or disconnected sensing hose — leaves the furnace stuck after the inducer starts, often flashing a pressure-switch fault code.\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-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\u003eCombustion airflow \/ draft safety\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage\u003c\/td\u003e\n\u003ctd\u003e24V control circuit\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\u003eDirect fit for the ICP \/ Tempstar \/ Heil WPG4424090RKB1 packaged gas-electric unit. Match the OEM number 1178417 and the switch's pressure set-point before ordering — a switch with the wrong trip pressure will cause nuisance lockouts.\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 unit disconnect and verify zero voltage with a multimeter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the service panel near the draft inducer.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph the wire terminals and the sensing-hose routing before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Pull the sensing hose, disconnect the spade terminals, and remove the mounting screws.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Mount the new switch, reconnect the wires per your photo, and seat the tubing fully so there are no leaks or kinks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power, run a heat cycle, and confirm the inducer starts, the switch closes, and the burners light without a lockout.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eInducer runs but the furnace never ignites\u003c\/li\u003e\n\u003cli\u003eControl board flashes a pressure-switch fault code\u003c\/li\u003e\n\u003cli\u003eFurnace short-cycles or locks out intermittently\u003c\/li\u003e\n\u003cli\u003eSwitch contacts fail to close even with good draft\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":63021507248499,"sku":"WPG4424090RKB1","price":38.94,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":63047706345843,"sku":"WPG4424090RKB1-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-WPG4424090RKB1.jpg?v=1782895165","url":"https:\/\/nationalhvacparts.com\/products\/icp-pressure-switch-for-wpg4424090rkb1-furnace-air-proving-safety-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}