{"product_id":"tempstar-40va-transformer-for-teb07k34rta-208-240v-to-24v-ships-today","title":"Tempstar 40VA Transformer for TEB07K34RTA — 208\/240V to 24V | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\u003cp\u003eThis OEM 40VA control transformer steps the Tempstar TEB07K34RTA's 208\/240V line voltage down to the 24V needed by the unit's low-voltage controls and relays. The replacement covers the transformer (OEM 1056899, TRANS 208\/240→24 40VA) along with the 24V control relays (OEM 1053004 SPST and 1060940 DPST) that switch the compressor and fan circuits. When a control transformer fails — often from an overloaded secondary or a shorted thermostat wire — the entire 24V control circuit goes dead and the PTAC won't respond to any call for heating or cooling. A buzzing, overheated, or blown transformer is one of the most common no-power-to-controls failures.\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\u003ePart Numbers\u003c\/td\u003e\n\u003ctd\u003e1056899 (Transformer), 1053004 (Relay SPST), 1060940 (Relay DPST)\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\u003e208\/240V\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\u003eFit\u003c\/td\u003e\n\u003ctd\u003eOEM Direct Replacement\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eBuilt for the Tempstar TEB07K34RTA PTAC and shared across the ICP\/Heil\/Tempstar TEB07K34 series packaged terminal units. Confirm the primary voltage and VA rating against the failed transformer before installing.\u003c\/p\u003e\u003ch3\u003eInstallation Guide\u003c\/h3\u003e\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eSafety First\u003c\/strong\u003e — Disconnect power at the unit and breaker, then verify zero voltage with a multimeter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the PTAC front cover and control-box panel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph the primary and secondary leads and relay wiring before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Unbolt the transformer bracket, disconnect the leads, and unclip the relays.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Mount the new transformer, match primary to line and secondary to the 24V circuit, and reconnect the relays per your photo.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power, confirm 24V across the secondary, and verify the controls and relays energize.\u003c\/li\u003e\n\u003c\/ol\u003e\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eNo 24V power — unit completely unresponsive to thermostat calls\u003c\/li\u003e\n\u003cli\u003eBuzzing, humming, or visibly overheated transformer\u003c\/li\u003e\n\u003cli\u003eRepeatedly blown control fuse or burnt secondary winding\u003c\/li\u003e\n\u003cli\u003eRelays that won't pull in or chatter\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":63021645169011,"sku":"1053004-GEN","price":28.95,"currency_code":"USD","in_stock":true},{"title":"OEM","offer_id":63048411087219,"sku":"1053004","price":37.63,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-control-1053004_758fb3fd-b32f-4f34-9f88-80734f9f9b71.jpg?v=1782958546","url":"https:\/\/nationalhvacparts.com\/products\/tempstar-40va-transformer-for-teb07k34rta-208-240v-to-24v-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}