{"product_id":"tempstar-40va-transformer-for-t8mpl075f16b1-115v-to-24v-control-ships-today","title":"Tempstar 40VA Transformer for T8MPL075F16B1 — 115V to 24V Control | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThis is the genuine OEM 40VA control transformer (part number 1172810) for the Tempstar T8MPL075F16B1 gas furnace. The transformer steps the incoming 115-volt line voltage down to the 24-volt control voltage that powers the thermostat, gas valve, ignition control board, and safety circuits. Without a healthy transformer, none of the low-voltage controls receive power, so the furnace will not respond to a call for heat at all. Common failure symptoms include a completely dead control board, a thermostat with no display or a blank screen, a blown low-voltage fuse that keeps recurring, or a burnt-electrical smell at the transformer housing. A buzzing or visibly scorched transformer should be replaced immediately.\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\u003e1172810\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eControl 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\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\u003e115V\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 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\u003eEngineered as the factory replacement for the Tempstar T8MPL075F16B1 furnace and shared across many ICP-family platforms including Tempstar, Heil, Comfortmaker, and other ICP-built gas furnaces using a 40VA, 115V-to-24V control transformer. Confirm your existing transformer is rated 40VA with a 115V primary and 24V secondary 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 furnace switch and breaker, then verify zero voltage with a multimeter at the line terminals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the furnace control\/blower compartment service panel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph all primary (line) and secondary (24V) wire connections before disconnecting anything.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Disconnect the primary and secondary leads, then unbolt the transformer from its mounting bracket or junction box.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Mount the new transformer, reconnect the 115V primary and 24V secondary leads exactly per your photo, and verify wire nuts are secure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power, confirm 24V at the secondary with a meter, and run a full heat cycle.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eFurnace is completely unresponsive with a dead control board and blank thermostat.\u003c\/li\u003e\n\u003cli\u003eLow-voltage fuse blows repeatedly after replacement.\u003c\/li\u003e\n\u003cli\u003eNo measurable 24V across the secondary terminals.\u003c\/li\u003e\n\u003cli\u003eBuzzing, overheating, or a burnt smell from the transformer.\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":63021777158515,"sku":"1172810-GEN","price":24.95,"currency_code":"USD","in_stock":true},{"title":"OEM","offer_id":63048402993523,"sku":"1172810","price":32.44,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-control-1172810_e43982ed-58c9-426d-9c83-1e789ea7a315.jpg?v=1782958254","url":"https:\/\/nationalhvacparts.com\/products\/tempstar-40va-transformer-for-t8mpl075f16b1-115v-to-24v-control-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}