{"product_id":"icp-transformer-for-wpg3304040lkc1-208-230v-to-24v-40va-ships-today-1","title":"ICP Transformer for WPG3304040LKC1 — 208\/230V to 24V 40VA | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThis OEM control transformer steps down line voltage (208\/230V) to the 24V control voltage that powers your ICP WPG3304040LKC1 system's thermostat, control board, contactor coil, and gas valve. Rated at 40VA, it supplies the low-voltage circuit that virtually every safety and operating control depends on. When a control transformer fails, the entire 24V circuit goes dead: the thermostat screen goes blank, the contactor will not pull in, and the unit appears completely unresponsive even though line voltage is present. This package also includes the matching 24V barrier (OEM 1178431) for proper terminal isolation. Common failure causes are a shorted thermostat wire, a failed contactor coil, or age-related winding breakdown — always correct the underlying short before installing a new transformer or it will fail again.\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\u003e1173691 (transformer), 1178431 (24V barrier)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eControl \/ Step-Down Transformer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eICP (Tempstar \/ 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\u003e208 \/ 230 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Voltage\u003c\/td\u003e\n\u003ctd\u003e24 V\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 for the ICP \/ Tempstar \/ Heil WPG3304040LKC1 packaged unit and other ICP-family equipment using a 208\/230V-to-24V 40VA control transformer. Always confirm your existing transformer's VA rating and voltage taps match 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 breaker and disconnect switch, then verify zero voltage with a multimeter at the transformer terminals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the control\/electrical access panel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph all primary and secondary wire connections before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Label and disconnect the line-voltage primary leads and the 24V secondary leads, then unbolt the failed transformer from its mounting bracket.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Mount the new transformer, install the 24V barrier, and reconnect every lead to match your photo, confirming the correct voltage tap.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power and verify 24V across the secondary terminals and proper system response.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eNo 24V output measured across the secondary terminals.\u003c\/li\u003e\n\u003cli\u003eBlank thermostat and a completely unresponsive control circuit.\u003c\/li\u003e\n\u003cli\u003eRepeatedly blown low-voltage fuse or a buzzing\/overheating transformer.\u003c\/li\u003e\n\u003cli\u003eBurnt smell or visible scorching on the transformer body.\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":"ICP","offers":[{"title":"OEM","offer_id":63027222839667,"sku":"1178431","price":45.44,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":63047750058355,"sku":"1178431-GEN","price":34.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-control-1178431_6849ba67-6c9f-4379-8054-c41240523a32.jpg?v=1782896734","url":"https:\/\/nationalhvacparts.com\/products\/icp-transformer-for-wpg3304040lkc1-208-230v-to-24v-40va-ships-today-1","provider":"National HVAC Parts","version":"1.0","type":"link"}