{"product_id":"icp-24v-control-transformer-for-wfml090c048a1-40va-furnace-transformer-ships-today","title":"ICP 24V Control Transformer for WFML090C048A1 – 40VA Furnace Transformer | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThis genuine OEM control transformer (ICP part number 1176944) supplies the 24-volt low-voltage power for the ICP \/ Heil \/ Tempstar WFML090C048A1 gas furnace. It steps the line-voltage primary down to a 24V secondary that energizes the thermostat, control board, gas valve, igniter circuit, and blower\/inducer relays. When a transformer fails — typically from a shorted secondary, an overloaded accessory, or simple age — the furnace goes completely dead: no thermostat display, no call for heat, no blower. Replacing the transformer with the correct OEM part restores reliable 24V control power and protects the downstream control board.\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\u003e1176944\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eStep-down Control Transformer\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\u003eSecondary Voltage\u003c\/td\u003e\n\u003ctd\u003e24V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRating\u003c\/td\u003e\n\u003ctd\u003e40VA (typical furnace control rating)\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\u003eBuilt for the ICP\/Heil\/Tempstar WFML090C048A1 furnace and other WFML-series and ICP-family furnaces using the same 24V control transformer. Verify your existing transformer's primary voltage tap and VA rating against the unit wiring diagram 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 furnace switch and breaker, then verify zero voltage at the transformer leads with a multimeter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e – Remove the control\/burner compartment service panel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e – Photograph every primary and secondary wire and tap before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e – Disconnect the line-voltage primary and 24V secondary leads, then unscrew the transformer from the panel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e – Mount the new transformer, match the primary tap to your supply voltage, and reconnect the secondary per your photo.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e – Restore power, confirm 24V across the secondary, and run a heat call to verify normal operation.\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 display.\u003c\/li\u003e\n\u003cli\u003eNo 24V present across the transformer secondary.\u003c\/li\u003e\n\u003cli\u003eTransformer is hot, buzzing loudly, or smells burnt.\u003c\/li\u003e\n\u003cli\u003eRepeated blown low-voltage fuse after clearing shorts.\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":63021584220531,"sku":"1176944-GEN","price":28.95,"currency_code":"USD","in_stock":true},{"title":"OEM","offer_id":63047944274291,"sku":"1176944","price":37.63,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-control-1176944.jpg?v=1782881884","url":"https:\/\/nationalhvacparts.com\/products\/icp-24v-control-transformer-for-wfml090c048a1-40va-furnace-transformer-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}