{"product_id":"icp-40va-transformer-for-wfar120d066b1-oem-120v-to-24v-control-transformer-ships-today-1","title":"ICP 40VA Transformer for WFAR120D066B1 — OEM 120V to 24V Control Transformer | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThis OEM \u003cstrong\u003e40VA\u003c\/strong\u003e control transformer, part number \u003cstrong\u003e1177217\u003c\/strong\u003e, steps down line voltage from \u003cstrong\u003e120V to 24V\u003c\/strong\u003e to power the low-voltage control circuit on the ICP Tempstar Heil \u003cstrong\u003eWFAR120D066B1\u003c\/strong\u003e furnace. The 24V output drives the thermostat, control board logic, gas valve, and relays. When a transformer fails — usually from a short in the control circuit or simple age — the furnace goes completely dead with no thermostat response and no ignition sequence. A blown transformer is a frequent cause of a totally unresponsive furnace, and replacing it restores 24V control power throughout the system.\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\u003e1177217\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eControl Transformer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRating\u003c\/td\u003e\n\u003ctd\u003e40VA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary Voltage\u003c\/td\u003e\n\u003ctd\u003e120V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Voltage\u003c\/td\u003e\n\u003ctd\u003e24V\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\u003eFits Model\u003c\/td\u003e\n\u003ctd\u003eWFAR120D066B1\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\u003eBuilt for the ICP Tempstar Heil WFAR120D066B1 furnace and compatible across ICP-family brands (Comfortmaker, Heil, Tempstar, Arcoaire) using a 40VA 120V-24V control transformer. Verify the VA rating and voltage taps on your existing transformer 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 furnace switch and breaker, and verify zero voltage with a multimeter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the furnace control compartment service panel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph the primary (120V) and secondary (24V) wiring before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Disconnect the leads, remove the transformer mounting screws, and take out the old transformer.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Mount the new transformer, connect the 120V primary and 24V secondary leads per your photo, and confirm correct tap selection.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power and use a multimeter to verify 24V at the secondary, then run a heat cycle.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eFurnace is completely dead with no thermostat response\u003c\/li\u003e\n\u003cli\u003eNo 24V reading at the control board secondary terminals\u003c\/li\u003e\n\u003cli\u003eBurnt smell or visibly scorched transformer housing\u003c\/li\u003e\n\u003cli\u003eRepeated control-fuse failures after a short is cleared\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":"Direct Replacement","offer_id":63027246104947,"sku":"1177217-GEN","price":28.95,"currency_code":"USD","in_stock":true},{"title":"OEM","offer_id":63047955218803,"sku":"1177217","price":37.63,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-control-1177217_106ebca6-72df-4af0-945e-678a96f8a807.jpg?v=1782882687","url":"https:\/\/nationalhvacparts.com\/products\/icp-40va-transformer-for-wfar120d066b1-oem-120v-to-24v-control-transformer-ships-today-1","provider":"National HVAC Parts","version":"1.0","type":"link"}