{"product_id":"icp-40va-transformer-for-wpg4604115rkb1-208-230-to-24v-ships-today","title":"ICP 40VA Transformer for WPG4604115RKB1 — 208\/230 to 24V | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\u003cp\u003eThis OEM 40VA control transformer (ICP parts #1173691 transformer and #1178431 24V barrier) steps line voltage down to the 24-volt control power that runs the thermostat, contactor coil, gas valve, and control board on your ICP \/ Tempstar \/ Heil WPG4604115RKB1 package unit. Rated at 40VA with a 208\/230V primary and 24V secondary, it supplies the low-voltage circuit the entire system depends on. When the transformer fails — often from a shorted thermostat wire or a stuck contactor drawing too much current — the unit goes completely dead with no response at the thermostat. This direct-fit replacement restores 24V control power.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\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 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\/230 VAC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Voltage\u003c\/td\u003e\n\u003ctd\u003e24 VAC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eDirect OEM fit for the ICP\/Tempstar\/Heil WPG4604115RKB1 package gas\/electric unit and interchangeable across ICP-family furnaces, condensers, and package units using a 40VA, 208\/230-to-24V control transformer. Confirm VA rating and primary\/secondary voltages against the original before installing.\u003c\/p\u003e\u003ch3\u003eInstallation Guide\u003c\/h3\u003e\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eSafety First\u003c\/strong\u003e — Disconnect power at the breaker and disconnect, then verify zero voltage with a multimeter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the control compartment service panel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph the primary and secondary wiring before disconnecting; correct any shorted low-voltage wiring that caused the failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Disconnect the leads and unbolt the old transformer from its bracket.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Mount the new transformer, reconnect primary and secondary leads per your photo, and verify the 24V barrier is in place.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power and confirm 24 VAC at the secondary and normal thermostat operation.\u003c\/li\u003e\n\u003c\/ol\u003e\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eSystem completely dead — no thermostat display or response\u003c\/li\u003e\n\u003cli\u003eNo 24V control power measured at the secondary\u003c\/li\u003e\n\u003cli\u003eBurnt smell or visibly charred transformer windings\u003c\/li\u003e\n\u003cli\u003eRepeated control-fuse blowing or tripping\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eShipping \u0026amp; Returns\u003c\/h3\u003e\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":63021496631667,"sku":"WPG4604115RKB1","price":38.94,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":63047394394483,"sku":"WPG4604115RKB1-GEN","price":29.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-control-WPG4604115RKB1.jpg?v=1782883442","url":"https:\/\/nationalhvacparts.com\/products\/icp-40va-transformer-for-wpg4604115rkb1-208-230-to-24v-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}