{"product_id":"tempstar-40va-transformer-for-teb15k34rta-208-240v-to-24v-with-relays-ships-today","title":"Tempstar 40VA Transformer for TEB15K34RTA — 208\/240V to 24V with Relays | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\u003cp\u003eThis is the genuine OEM 40VA control transformer assembly for the Tempstar TEB15K34RTA. It includes the 208\/240V-to-24V, 40VA transformer (OEM 1056899) plus the matching 24V control relays — a standard 24V relay (OEM 1053004) and a 24V DPST relay (OEM 1060940). The transformer steps line voltage down to the 24V the control circuit needs to power the thermostat, relays, and other low-voltage components. When the transformer is open or shorted, the entire 24V control circuit goes dead — no thermostat response, no relay action, and no heating or cooling. The relays switch the higher-current loads on command from that 24V circuit.\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, 1053004, 1060940\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eControl Transformer + 24V Relays (DPST)\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\u003eDirect-fit for the Tempstar TEB15K34RTA and related ICP\/Heil units using the same 208\/240V-to-24V 40VA control platform. Confirm your unit's primary voltage and relay terminal layout 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 confirm zero voltage with a multimeter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the service panel to expose the control box.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph all primary, secondary, and relay wiring before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Unbolt the transformer and unseat the failed relays from their bases.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Mount the new 40VA transformer and relays, then reconnect each lead 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 relays switch their loads.\u003c\/li\u003e\n\u003c\/ol\u003e\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eNo 24V at the secondary — dead control circuit\u003c\/li\u003e\n\u003cli\u003eTripped breaker or blown low-voltage fuse on power-up\u003c\/li\u003e\n\u003cli\u003eRelays won't pull in or chatter under load\u003c\/li\u003e\n\u003cli\u003eBurnt smell, discoloration, or pitted relay contacts\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":63021642940787,"sku":"1053004-GEN","price":42.0,"currency_code":"USD","in_stock":true},{"title":"OEM","offer_id":63048411939187,"sku":"1053004","price":54.6,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-control-1053004_1b08794f-7950-4466-8fd3-7dc3da5695b4.jpg?v=1782958577","url":"https:\/\/nationalhvacparts.com\/products\/tempstar-40va-transformer-for-teb15k34rta-208-240v-to-24v-with-relays-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}