{"product_id":"icp-24v-transformer-for-wch3364gka2-40va-control-power-ships-today-1","title":"ICP 24V Transformer for WCH3364GKA2 — 40VA Control Power | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThis OEM 24-volt control transformer supplies the low-voltage power that runs the control circuit on your ICP Tempstar Heil WCH3364GKA2 heat pump. It steps line voltage down to a stable 24V to energize the contactor coil, reversing valve solenoid (parts 1172574 \/ 1175621), and thermostat circuit. Rated at 40VA, it provides the steady control current the system needs to switch reliably between heating and cooling. When a transformer fails — open winding, shorted turns, or a tripped internal fuse — the entire 24V control side goes dead: the thermostat blanks, the contactor never pulls in, and the outdoor unit will not respond to a call.\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\u003e1172574 (Coil Rev Vlv 24V), 1175621 (Valve Rev w\/Coil 24V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003e24V Step-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\u003eSecondary Voltage\u003c\/td\u003e\n\u003ctd\u003e24V\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\u003eFitment\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\u003eDirect OEM low-voltage control replacement for the ICP\/Tempstar\/Heil\/Comfortmaker WCH3364GKA2 heat pump. Confirm your existing component's secondary voltage (24V) and VA rating before installing, and match the wiring leads to your unit's control schematic.\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 main breaker. Verify zero voltage with a multimeter on both the line and 24V sides.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the unit's electrical access panel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph all primary and secondary leads before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Disconnect the line-voltage primary and 24V secondary leads, then unmount the old component.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Mount the new part and reconnect each lead exactly per your photo, keeping line and low-voltage sides separate.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power, confirm 24V at the secondary with a meter, and verify the contactor and reversing valve energize on a call.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eDead or blank thermostat with no 24V control power\u003c\/li\u003e\n\u003cli\u003eContactor never pulls in despite a valid call\u003c\/li\u003e\n\u003cli\u003eReversing valve fails to shift between heat and cool\u003c\/li\u003e\n\u003cli\u003eBurned smell or visibly scorched windings at the control component\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":63027253018995,"sku":"1172574","price":29.84,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":63047358644595,"sku":"1172574-GEN","price":22.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-control-1172574_e7197d4a-05af-4e68-a0d7-f5ab3e4992d0.jpg?v=1782881982","url":"https:\/\/nationalhvacparts.com\/products\/icp-24v-transformer-for-wch3364gka2-40va-control-power-ships-today-1","provider":"National HVAC Parts","version":"1.0","type":"link"}