{"product_id":"tempstar-40va-transformer-208-230v-to-24v-for-tca760gkb101-oem-1170676-ships-today","title":"Tempstar 40VA Transformer 208\/230V to 24V for TCA760GKB101 — OEM 1170676 | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThis genuine OEM control transformer (part number 1170676) supplies the 24-volt control power for the Tempstar TCA760GKB101 system. It steps the 208\/230V line voltage down to 24V at 40VA, energizing the thermostat, contactor coil, and other low-voltage controls. When the transformer fails — usually from a shorted control circuit, a stuck contactor coil, or simple age — the entire low-voltage side goes dead: the thermostat screen may go blank, the contactor won't pull in, and the system won't respond to a cooling call even though high-voltage power is present. A burnt smell, a tripped low-voltage fuse, or 0 volts on the secondary terminals confirms the transformer needs to 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\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003e1170676\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\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary Voltage\u003c\/td\u003e\n\u003ctd\u003e208\/230V\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\u003eRating\u003c\/td\u003e\n\u003ctd\u003e40 VA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFits Model\u003c\/td\u003e\n\u003ctd\u003eTCA760GKB101\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 Tempstar TCA760GKB101 air conditioning system. Confirm the primary voltage taps (208\/230V), 24V secondary, and 40VA rating match your original 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 disconnect and breaker, then 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 in the control compartment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph the primary (line) and secondary (24V) wiring before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Label and disconnect the primary and secondary leads, then unbolt the old transformer from its mount.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Mount the new transformer, connect the correct primary tap for your supply voltage, and reconnect the 24V secondary per your photo.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power and confirm 24V at the secondary and that the controls respond to a cooling call.\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 or completely dead low-voltage controls\u003c\/li\u003e\n\u003cli\u003eContactor won't pull in despite line power being present\u003c\/li\u003e\n\u003cli\u003e0 volts measured across the 24V secondary terminals\u003c\/li\u003e\n\u003cli\u003eBurnt smell or repeatedly 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 on orders placed before 3 PM CST. 30-day returns on unused parts. Backed by the National HVAC Parts fitment guarantee.\u003c\/p\u003e","brand":"Tempstar","offers":[{"title":"Direct Replacement","offer_id":63021660897651,"sku":"1170676-GEN","price":28.0,"currency_code":"USD","in_stock":true},{"title":"OEM","offer_id":63048401453427,"sku":"1170676","price":36.4,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-control-1170676_d8acdd6f-9c7e-4eec-8ef3-bc3cbc5ab59f.jpg?v=1782958199","url":"https:\/\/nationalhvacparts.com\/products\/tempstar-40va-transformer-208-230v-to-24v-for-tca760gkb101-oem-1170676-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}