{"product_id":"icp-40va-transformer-for-wpg3604090rkc1-208-230-to-24v-kit-ships-today-1","title":"ICP 40VA Transformer for WPG3604090RKC1 — 208\/230 to 24V Kit | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThis genuine OEM transformer kit for the ICP \/ Tempstar \/ Heil WPG3604090RKC1 packaged unit includes the 40VA step-down transformer (part 1173691) and its 24V terminal barrier (part 1178431). The transformer converts the 208\/230V line supply down to the 24V control voltage that powers the thermostat, control board, gas valve, contactor coil, and pressure switch circuit. At 40VA it provides ample low-voltage capacity for the unit's full control load. The transformer is the heart of the control circuit — when it fails, the entire low-voltage side goes dead: no thermostat display, no relay pull-in, and neither heating nor cooling will operate. The included barrier keeps the 24V terminal connections organized and properly isolated.\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\u003eOEM Part Numbers\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\u003eStep-Down Control Transformer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eICP (Tempstar \/ Heil \/ Comfortmaker)\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\u003eFitment\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\u003eDirect OEM replacement for the ICP \/ Tempstar \/ Heil WPG3604090RKC1 packaged gas-electric unit and compatible ICP-family equipment using the 40VA 208\/230-to-24V transformer 1173691 with barrier 1178431. Confirm the primary voltage tap and VA rating 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 unit disconnect and breaker, then verify zero voltage with a multimeter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the electrical\/control access panel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph the primary (line) and secondary (24V) wiring and the barrier layout before removal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Label and disconnect the primary and secondary leads, then unmount the old transformer and barrier.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Mount the new transformer and barrier, wire the correct primary tap (208 or 230V), and connect the 24V secondary 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 heating and cooling calls operate.\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 control voltage — thermostat is blank and nothing energizes.\u003c\/li\u003e\n\u003cli\u003eTransformer is hot, buzzing, or has a burnt smell.\u003c\/li\u003e\n\u003cli\u003eRepeated blown low-voltage fuses or a shorted secondary.\u003c\/li\u003e\n\u003cli\u003eOpen primary or secondary winding when measured with a meter.\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":"Direct Replacement","offer_id":63027216220531,"sku":"1178431-GEN","price":36.0,"currency_code":"USD","in_stock":true},{"title":"OEM","offer_id":63047963345267,"sku":"1178431","price":46.8,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-control-1178431_2d1aa0f1-2034-4ffc-a29a-beab5e9ca6a7.jpg?v=1782883265","url":"https:\/\/nationalhvacparts.com\/products\/icp-40va-transformer-for-wpg3604090rkc1-208-230-to-24v-kit-ships-today-1","provider":"National HVAC Parts","version":"1.0","type":"link"}