{"product_id":"icp-transformer-for-wfar100c066b1-40va-120-24v-ships-today","title":"ICP Transformer for WFAR100C066B1 – 40VA 120\/24V | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThis OEM control transformer steps the 120V line voltage down to the 24V the control circuit needs in your ICP \/ Heil \/ Tempstar WFAR100C066B1 air handler. Rated at 40VA, it powers the thermostat, relays, and control board's low-voltage side. When a transformer fails, the entire 24V control circuit goes dead: the thermostat is blank, no relays pull in, and the system won't respond. A buzzing, hot, or burnt-smelling transformer is also a clear sign of failure. This direct-fit replacement (part 1177217) restores reliable 24V control power.\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\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\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\u003eVoltage\u003c\/td\u003e\n\u003ctd\u003e120V primary \/ 24V secondary\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFits Model\u003c\/td\u003e\n\u003ctd\u003eWFAR100C066B1\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, and Comfortmaker WFAR100C066B1 air handler \/ fan coil. Confirm the primary voltage tap (120V) and VA rating match your existing transformer 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 breaker and verify zero voltage with a multimeter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e – Remove the service panel to reach the transformer.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e – Photograph the primary and secondary lead positions before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e – Disconnect the leads and unbolt the transformer from its bracket.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e – Mount the new transformer and reconnect the 120V primary and 24V secondary leads per your photo.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e – Restore power and confirm 24V at the secondary with a multimeter.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eBlank thermostat \/ no 24V control power\u003c\/li\u003e\n\u003cli\u003eRelays won't energize and system won't start\u003c\/li\u003e\n\u003cli\u003eTransformer buzzes, runs hot, or smells burnt\u003c\/li\u003e\n\u003cli\u003eRepeatedly blown low-voltage fuse\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":63021591331187,"sku":"1177217","price":42.84,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":63047738884467,"sku":"1177217-GEN","price":32.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-control-1177217_183465c3-18e5-4571-a011-a3f98d212d51.jpg?v=1782896427","url":"https:\/\/nationalhvacparts.com\/products\/icp-transformer-for-wfar100c066b1-40va-120-24v-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}