{"product_id":"icp-tubing-pressure-switch-for-wpg4244040rkb1-24v-furnace-safety-control-ships-today","title":"ICP Tubing Pressure Switch for WPG4244040RKB1 — 24V Furnace Safety Control | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThis OEM tubing pressure switch (ICP part #1178417) is a 24-volt air-proving safety control used in ICP, Heil, Tempstar, and Comfortmaker WPG-series packaged gas\/electric units. It monitors negative pressure in the induced-draft venting system and confirms the inducer motor is moving combustion air before the control board permits ignition. The switch connects to the inducer housing through a short length of sensing tubing and opens or closes a single set of contacts based on the pressure differential it reads. If proper draft is not established, the switch keeps its contacts open, the ignition sequence is blocked, and the furnace locks out — protecting the home from incomplete combustion and flue gas spillage. Common failure symptoms include a furnace that runs the inducer but never lights, repeated lockouts, a clicking relay with no flame, or a blocked\/cracked sensing tube giving false pressure readings.\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 \/ Air-Proving Pressure Switch\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\u003eControl Voltage\u003c\/td\u003e\n\u003ctd\u003e24V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFunction\u003c\/td\u003e\n\u003ctd\u003eInducer draft proving safety\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFitment\u003c\/td\u003e\n\u003ctd\u003eOEM 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\u003eEngineered as the exact OEM replacement for the ICP\/Tempstar\/Heil WPG4244040RKB1 packaged gas\/electric unit and shared across many WPG-series cabinets that use the same induced-draft 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 unit disconnect and breaker, then verify zero voltage at the control with a multimeter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the unit's blower\/control access panel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph the wire terminals and the sensing tube routing before disconnecting anything.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Pull the two spade connectors off the old switch, disconnect the sensing tube, and remove the mounting screw(s).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Mount the new switch, reconnect the sensing tube fully seated, and reattach the wires per your photo.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power and confirm the inducer starts, the switch closes, and the burners light on a heat call.\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 burners never ignite\u003c\/li\u003e\n\u003cli\u003eFurnace repeatedly locks out and retries\u003c\/li\u003e\n\u003cli\u003eSwitch fails to close even with good draft (verified with manometer)\u003c\/li\u003e\n\u003cli\u003eCracked, brittle, or clogged sensing tube\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":63021519470963,"sku":"1178417","price":37.7,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":63047757136243,"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_52780f85-69d9-4a5a-87d7-6d77f8ae42e4.jpg?v=1782897007","url":"https:\/\/nationalhvacparts.com\/products\/icp-tubing-pressure-switch-for-wpg4244040rkb1-24v-furnace-safety-control-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}