{"product_id":"tempstar-40va-transformer-for-tch960gka100-208-230v-to-24v-ships-today","title":"Tempstar 40VA Transformer for TCH960GKA100 — 208\/230V to 24V | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThis genuine OEM transformer (part #1170676) supplies the 24V control voltage for the Tempstar TCH960GKA100. It steps down line voltage of 208\/230V to a 24V secondary rated at 40VA, powering the thermostat, control board, contactor coil, gas valve, and other low-voltage components. When a transformer fails, the entire low-voltage control circuit goes dead — no thermostat display, no contactor pull-in, and no system operation. Transformers commonly fail from a shorted control circuit, a seized contactor coil, or age-related winding breakdown.\u003c\/p\u003e\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\u003eDescription\u003c\/td\u003e\n\u003ctd\u003eTransformer, 208\/230 \u0026gt; 24V, 40VA\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\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\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cp\u003eFits the Tempstar TCH960GKA100 and many ICP-family units (Tempstar, Heil, Comfortmaker, Arcoaire) using a 208\/230V-to-24V 40VA control transformer. Confirm the existing transformer is marked 1170676 and matches your primary\/secondary taps before wiring.\u003c\/p\u003e\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 panel cover to expose the transformer and low-voltage terminals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph every primary and secondary lead and which tap each wire lands on.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Disconnect the leads, then unbolt the transformer from its mounting bracket.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Mount the new 1170676, connect the correct primary tap (208 or 230V) and the 24V secondary leads per your photo.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power and confirm 24V across the secondary and normal system startup.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eNo 24V at the thermostat or control board (blank thermostat, dead system).\u003c\/li\u003e\n\u003cli\u003eRepeatedly blown low-voltage fuse or burnt-smelling transformer.\u003c\/li\u003e\n\u003cli\u003eMeasured 0V on the secondary with line voltage present on the primary.\u003c\/li\u003e\n\u003cli\u003eVisible scorching, swelling, or melted potting on the transformer body.\u003c\/li\u003e\n\u003c\/ul\u003e\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":63021650608499,"sku":"1170676-GEN","price":28.0,"currency_code":"USD","in_stock":true},{"title":"OEM","offer_id":63048410104179,"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_a0c92db2-6bcc-41dc-a2ac-97ab6d4ee43b.jpg?v=1782958512","url":"https:\/\/nationalhvacparts.com\/products\/tempstar-40va-transformer-for-tch960gka100-208-230v-to-24v-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}