{"product_id":"tempstar-transformer-for-tck050f12a1-40va-115-24v-ships-today","title":"Tempstar Transformer for TCK050F12A1 — 40VA 115\/24V | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThis is the genuine OEM control transformer (part number 1011626, \"TRANS 115\u0026gt;24 40VA\") for the Tempstar TCK050F12A1 gas furnace. The transformer steps line voltage (115V) down to the 24V control voltage that powers the thermostat, gas valve, igniter circuit, and control board relays. Rated at 40VA, it supplies enough current to drive the entire low-voltage control circuit. When a transformer fails, the furnace goes completely dead on the control side — the thermostat screen may go blank, the blower and burners never start, and you will often find a blown low-voltage fuse on the control board. A transformer that hums loudly, runs hot, or shows no 24V output between the R and C terminals has failed internally and must be replaced.\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\u003e1011626\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eControl \/ Step-Down Transformer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eTempstar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRating\u003c\/td\u003e\n\u003ctd\u003e40 VA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary Voltage\u003c\/td\u003e\n\u003ctd\u003e115V\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\u003eFits Model\u003c\/td\u003e\n\u003ctd\u003eTCK050F12A1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cp\u003eDesigned as a direct-fit OEM replacement for the Tempstar TCK050F12A1 furnace. This 40VA 115\/24V transformer is also commonly used across ICP, Heil, Comfortmaker, and other family-brand furnaces that share the same control platform. Always confirm your primary voltage and VA rating against the failed unit 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 with a multimeter before touching any wiring.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the furnace control \/ blower compartment door to expose the control board and transformer.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph the transformer wiring (primary line leads and the 24V secondary leads to the board) before disconnecting anything.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Disconnect the primary and secondary leads, then unbolt the transformer from its mounting bracket or the control box.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Mount the new transformer, reconnect the primary (115V) and secondary (24V) leads exactly per your photo, and secure all connections.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power and confirm 24V across the R and C terminals, then run a full 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 unresponsive and the thermostat is dead.\u003c\/li\u003e\n\u003cli\u003eRepeatedly blown low-voltage (3A\/5A) control fuse.\u003c\/li\u003e\n\u003cli\u003eNo 24V output measured between the secondary terminals.\u003c\/li\u003e\n\u003cli\u003eTransformer buzzes loudly, smells burnt, or is hot to the touch.\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":"Tempstar","offers":[{"title":"Direct Replacement","offer_id":63021650116979,"sku":"1011626-GEN","price":24.95,"currency_code":"USD","in_stock":true},{"title":"OEM","offer_id":63048491401587,"sku":"1011626","price":32.44,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-control-1011626_3f8b1207-e774-4bfd-8efb-e0156def7392.jpg?v=1782961475","url":"https:\/\/nationalhvacparts.com\/products\/tempstar-transformer-for-tck050f12a1-40va-115-24v-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}