{"product_id":"icp-40va-transformer-for-wpg4364090lkb1-208-230v-to-24v-ships-today-1","title":"ICP 40VA Transformer for WPG4364090LKB1 — 208\/230V to 24V | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThis OEM transformer kit fits the ICP \/ Tempstar \/ Heil WPG4364090LKB1 packaged unit and includes the 40VA step-down transformer (part number 1173691) and its 24V barrier (part number 1178431). The transformer steps line voltage of 208\/230V down to the 24V control voltage that powers the thermostat, gas valve, contactor coil, control board, and safety circuit. A failed transformer is one of the most common no-power \/ no-response failures: when it opens or shorts, the entire low-voltage control system goes dead and the unit will not respond to a call for heat or cool. The included barrier provides the required separation between line and low-voltage wiring.\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\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRating\u003c\/td\u003e\n\u003ctd\u003e40VA\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\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eFurnace \/ Packaged Unit Control Circuit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cp\u003eBuilt as the factory control transformer for the ICP WPG4364090LKB1 and equivalent Tempstar, Heil, and Comfortmaker packaged units on this platform. Confirm primary tap voltage, VA rating, and secondary voltage against your existing transformer before wiring.\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 and breaker, then verify zero voltage with a multimeter at the transformer primary leads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the control \/ blower panel to reach the transformer and barrier on the control deck.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph the primary tap (208 vs 230), secondary leads, and barrier placement before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Label and disconnect all leads, then unbolt the failed transformer and old barrier from the panel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Mount the new transformer and barrier, land the correct primary tap for your supply voltage, and reconnect the 24V secondary per your photo.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power and confirm a steady 24-28V across the secondary and normal control response.\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 system — thermostat, contactor, and valve all unresponsive\u003c\/li\u003e\n\u003cli\u003eNo measurable 24V on the secondary with line voltage present\u003c\/li\u003e\n\u003cli\u003eRepeatedly blown low-voltage fuse from a shorted winding\u003c\/li\u003e\n\u003cli\u003eBurnt smell, discoloration, or buzzing 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":"ICP","offers":[{"title":"Direct Replacement","offer_id":63027211272563,"sku":"1178431-GEN","price":32.95,"currency_code":"USD","in_stock":true},{"title":"OEM","offer_id":63047964066163,"sku":"1178431","price":42.84,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-control-1178431_1e9212d9-cbe1-436c-9b30-0d84f986824e.jpg?v=1782883357","url":"https:\/\/nationalhvacparts.com\/products\/icp-40va-transformer-for-wpg4364090lkb1-208-230v-to-24v-ships-today-1","provider":"National HVAC Parts","version":"1.0","type":"link"}