{"product_id":"tempstar-40va-transformer-for-tch924gka300-208-230v-to-24v-ships-today","title":"Tempstar 40VA Transformer for TCH924GKA300 — 208\/230V to 24V | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThis genuine OEM 40VA control transformer (part number 1170676) provides the 24V control power for the Tempstar TCH924GKA300 heat pump. It steps 208\/230V line voltage down to the 24V used by the thermostat, contactor coil, defrost control board, and the reversing valve solenoid circuit. On a heat pump like the TCH924GKA300, that 24V also energizes the reversing valve coil (companion OEM parts 1172574 and 1173715) that switches the system between heating and cooling. A failed transformer leaves the entire low-voltage system dead — no thermostat, no call, and no reversing valve action. Installing the correct 40VA OEM transformer restores full control-circuit power.\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 (ICP \/ Heil family)\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\/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\u003eRelated Parts\u003c\/td\u003e\n\u003ctd\u003e1172574 (rev valve coil 24V), 1173715 (rev valve w\/coil 24V)\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\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cp\u003eA direct-fit replacement for the Tempstar TCH924GKA300 heat pump. The shared ICP\/Tempstar\/Heil\/Comfortmaker platform means this 40VA 208\/230V-to-24V transformer also services many equivalent models across those brands. Confirm part number 1170676 and your primary voltage tap before ordering.\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, and verify zero voltage with a multimeter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the control\/service panel to expose the transformer and its wiring.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph the primary\/secondary connections and the voltage tap in use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Disconnect the primary and secondary leads, then unbolt the transformer from its bracket.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Mount the new transformer, land the primary on the matching 208 or 230V tap, 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 on the secondary plus a working thermostat, contactor, and reversing valve call.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eDead thermostat with no 24V control power\u003c\/li\u003e\n\u003cli\u003eNo response to any heating, cooling, or defrost call\u003c\/li\u003e\n\u003cli\u003eReversing valve won't shift and contactor won't pull in\u003c\/li\u003e\n\u003cli\u003eRepeatedly blown low-voltage fuse or burnt transformer odor\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":63021651165555,"sku":"1172574-GEN","price":34.95,"currency_code":"USD","in_stock":true},{"title":"OEM","offer_id":63048409809267,"sku":"1172574","price":45.44,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-control-1172574_0a37d571-1a50-4286-a4d6-dcc34304601c.jpg?v=1782958501","url":"https:\/\/nationalhvacparts.com\/products\/tempstar-40va-transformer-for-tch924gka300-208-230v-to-24v-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}