{"product_id":"icp-tubing-pressure-switch-for-wpg3604115lkc1-furnace-safety-ships-today","title":"ICP Tubing Pressure Switch for WPG3604115LKC1 — Furnace Safety | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThis genuine OEM tubing pressure switch (ICP part 1178417) is the combustion-air safety on your ICP \/ Tempstar \/ Heil WPG3604115LKC1 packaged gas-electric unit. When the draft inducer starts on a heat call, it pulls a vacuum on the switch through its sensing tube. If adequate draft is proven, the switch closes and signals the control board that it's safe to energize the igniter and gas valve. This protects against blocked flue, cracked heat exchanger draft loss, or a failed inducer by preventing ignition when proper venting can't be confirmed. The switch and its tubing are a frequent no-heat culprit — a stuck-open switch, clogged sensing port, or cracked tube blocks the ignition sequence even when everything else is healthy.\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\u003eOEM Part 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 Air Pressure \/ Draft Switch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eICP (Tempstar \/ Heil \/ Comfortmaker)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eControl Circuit\u003c\/td\u003e\n\u003ctd\u003e24V Low Voltage\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFunction\u003c\/td\u003e\n\u003ctd\u003eCombustion Air \/ Inducer Draft Proving\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFitment\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 OEM replacement for the ICP \/ Tempstar \/ Heil WPG3604115LKC1 packaged gas-electric unit and compatible ICP-family heating sections using pressure switch 1178417. Match the trip setpoint (in. w.c.) stamped on the old switch before ordering.\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 breaker, then verify zero voltage with a multimeter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the control\/inducer access panel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph the switch wiring and the sensing tube routing before removal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Pull the spade terminals and the sensing hose, then unscrew the switch from its bracket.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Mount the new switch, reconnect the wiring, and seat the sensing tube fully with no kinks or cracks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power, start a heat call, and confirm the inducer proves draft and the burners light.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eNo heat — inducer runs but the board never advances to ignition.\u003c\/li\u003e\n\u003cli\u003eSwitch fails to close (or won't open) when tested with a manometer\/meter.\u003c\/li\u003e\n\u003cli\u003eCracked, brittle, or condensate-blocked sensing tubing.\u003c\/li\u003e\n\u003cli\u003eIntermittent lockouts that clear after the inducer cycles.\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":63021523632499,"sku":"1178417","price":37.7,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":63047756775795,"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_e62eba64-3ded-4d63-82c5-e0ade959f09f.jpg?v=1782896993","url":"https:\/\/nationalhvacparts.com\/products\/icp-tubing-pressure-switch-for-wpg3604115lkc1-furnace-safety-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}