{"product_id":"tempstar-40va-transformer-for-tch636gka200-208-230v-to-24v-control-ships-today","title":"Tempstar 40VA Transformer for TCH636GKA200 — 208\/230V to 24V Control | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThis OEM control transformer (part number 1170676) supplies the 24-volt power that runs the entire low-voltage control system in your Tempstar TCH636GKA200. It steps 208\/230V line voltage down to 24V at 40VA, feeding the thermostat, contactor coil, relays, and safety switches. The transformer is the heart of the control circuit — when it fails, the unit goes completely dead on the control side: no thermostat response, no contactor pull-in, and no cooling or heating call. Failures usually come from a shorted control wire, an overloaded coil, or simply age. This 40VA OEM transformer delivers the exact voltage and capacity the TCH636GKA200 was engineered for, restoring full control power without overloading.\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)\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\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eFurnace \/ Air Handler \/ Condensing Unit Control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cp\u003eFactory replacement 40VA transformer for the Tempstar TCH636GKA200. The 1170676 part is common across ICP-family equipment sold under Tempstar, Heil, Comfortmaker, and Arcoaire that uses a 208\/230V-to-24V 40VA control transformer. Confirm your primary supply is 208\/230V and that 40VA meets your control load 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 before touching the primary leads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the control\/electrical access panel to reach the transformer mounting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph the primary (line) and secondary (24V) wire connections 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 transformer from its bracket.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Mount the new transformer, connect the 208\/230V leads to the primary and the 24V leads to the secondary exactly per your photo.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power and confirm 24V across the secondary, then verify the thermostat and contactor respond on a call.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCompletely dead control side — blank thermostat, no response to a call\u003c\/li\u003e\n\u003cli\u003eNo measurable 24V at the transformer secondary\u003c\/li\u003e\n\u003cli\u003eBurned smell, discolored housing, or melted potting on the old unit\u003c\/li\u003e\n\u003cli\u003eRepeated control fuse blowing or contactor that won't pull in\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":63021652181363,"sku":"1170676-GEN","price":31.95,"currency_code":"USD","in_stock":true},{"title":"OEM","offer_id":63048409678195,"sku":"1170676","price":41.54,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-control-1170676_3c7074ed-ecff-4ed9-9db5-a00eda7dd1be.jpg?v=1782958496","url":"https:\/\/nationalhvacparts.com\/products\/tempstar-40va-transformer-for-tch636gka200-208-230v-to-24v-control-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}