{"product_id":"tempstar-40va-277v-to-24v-transformer-for-teb15r25rta-oem-ships-today","title":"Tempstar 40VA 277V-to-24V Transformer for TEB15R25RTA — OEM | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\u003cp\u003eThis is a genuine OEM 40VA step-down control transformer for the Tempstar TEB15R25RTA packaged terminal air conditioner, part number 1091226, which steps 277-volt line power down to the 24-volt control voltage the unit needs. The TEB15R25RTA control package also uses two 24V relays — a standard relay (1053004) and a DPST relay (1060940) — that switch on the transformer's low-voltage output. A failed transformer leaves the entire control circuit dead: no thermostat response, no relay action, and no operation at all.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\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\u003eTransformer Part Number\u003c\/td\u003e\n\u003ctd\u003e1091226\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\u003eTempstar (ICP \/ Heil)\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\u003e277 VAC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Voltage\u003c\/td\u003e\n\u003ctd\u003e24 VAC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompanion Relays\u003c\/td\u003e\n\u003ctd\u003e1053004 (24V), 1060940 (24V DPST)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFit\u003c\/td\u003e\n\u003ctd\u003eOEM Replacement\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eDesigned as a direct-fit replacement for the Tempstar TEB15R25RTA PTAC. The same 40VA 277-to-24V transformer and companion relays are shared across related ICP, Heil, and Comfortmaker TEB15-series 277V PTAC units. Confirm part number 1091226 and your supply voltage before ordering.\u003c\/p\u003e\u003ch3\u003eInstallation Guide\u003c\/h3\u003e\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eSafety First\u003c\/strong\u003e — Disconnect 277V power at the breaker and verify zero voltage with a multimeter; 277V is lethal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the front cabinet and control-box service panel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph the primary and secondary leads before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Disconnect the line and load wires and unbolt the transformer from its bracket.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Mount the new transformer, wire 277V to the primary and 24V to the secondary per your photo.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power and confirm 24 VAC at the secondary and that the relays energize.\u003c\/li\u003e\n\u003c\/ol\u003e\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eUnit completely dead with no control response.\u003c\/li\u003e\n\u003cli\u003eNo 24 VAC measured at the transformer secondary.\u003c\/li\u003e\n\u003cli\u003eRepeated blown low-voltage fuses or tripped breakers.\u003c\/li\u003e\n\u003cli\u003eBurnt smell, scorching, or a swollen transformer body.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eShipping \u0026amp; Returns\u003c\/h3\u003e\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":63021642613107,"sku":"1053004-GEN","price":34.0,"currency_code":"USD","in_stock":true},{"title":"OEM","offer_id":63048400994675,"sku":"1053004","price":44.2,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-control-1053004_1c444087-c091-4210-8619-242e42581789.jpg?v=1782958180","url":"https:\/\/nationalhvacparts.com\/products\/tempstar-40va-277v-to-24v-transformer-for-teb15r25rta-oem-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}