{"product_id":"icp-24v-transformer-for-wch3304gkb1-40va-control-ships-today","title":"ICP 24V Transformer for WCH3304GKB1 — 40VA Control | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\u003cp\u003eThis OEM 24-volt control transformer provides the low-voltage power that operates the ICP WCH3304GKB1 heat pump's control circuit (associated OEM parts #1172574 and #1175621). It steps incoming line voltage down to a steady 24 VAC at about 40VA, feeding the contactor coil, defrost control board, reversing-valve coil, and thermostat. Every low-voltage device in the system relies on this transformer. When it fails — typically from a shorted secondary, an overloaded control circuit, or simple age — the unit becomes totally unresponsive: no contactor pull-in, a dead thermostat, and no 24V present at the board. A burnt smell or a bulged, discolored case confirms the failure. It's a low-cost part whose failure disables the entire system, so replacing it is a quick, high-impact repair.\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\u003e1172574, 1175621\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\u003eICP (Tempstar \/ Heil \/ Comfortmaker)\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\u003ctr\u003e\n\u003ctd\u003eRating\u003c\/td\u003e\n\u003ctd\u003e40 VA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eHeat Pump control circuit\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 WCH3304GKB1 heat pump and matching ICP-family units using a 24V\/40VA control transformer. Always confirm primary and secondary voltage and VA rating against your existing transformer 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 disconnect and verify zero voltage with a multimeter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the condenser service\/control panel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph the primary and secondary lead connections.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Disconnect leads, unbolt the transformer from its bracket, and remove it.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Mount the new transformer and reconnect primary and secondary leads exactly per your photo.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power and confirm 24 VAC at the secondary and proper control-circuit operation.\u003c\/li\u003e\n\u003c\/ol\u003e\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eNo 24V control power anywhere in the system\u003c\/li\u003e\n\u003cli\u003eContactor won't pull in and thermostat is dead\u003c\/li\u003e\n\u003cli\u003eBurnt smell or visibly bulged\/discolored transformer\u003c\/li\u003e\n\u003cli\u003eRecurring blown low-voltage fuse\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":"Direct Replacement","offer_id":63021599261043,"sku":"1172574-GEN","price":32.0,"currency_code":"USD","in_stock":true},{"title":"OEM","offer_id":63047946568051,"sku":"1172574","price":41.6,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-control-1172574_fbea0802-4ccc-4a6d-ab6e-3fd1fe4b2b06.jpg?v=1782881965","url":"https:\/\/nationalhvacparts.com\/products\/icp-24v-transformer-for-wch3304gkb1-40va-control-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}