{"product_id":"icp-24v-transformer-for-wph4304000rka1-40va-control-transformer-ships-today-1","title":"ICP 24V Transformer for WPH4304000RKA1 — 40VA Control Transformer | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThis OEM 24-volt control transformer steps line voltage down to the 24V needed to power the low-voltage control circuit on your ICP\/Tempstar\/Heil WPH4304000RKA1 heat pump. The transformer feeds the thermostat, control board, contactor coil, and reversing valve solenoid (24V coil) — without it, none of the low-voltage controls function. Rated at 40VA, it provides the control-circuit power these systems require. When a transformer fails, the entire 24V circuit goes dead: no thermostat display, no relay engagement, and a completely unresponsive system. Failures usually trace back to a shorted control wire or a stuck contactor coil drawing excess current.\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\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)\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\u003e40 VA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eLow-Voltage Control Circuit \/ Reversing Valve 24V Coil\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cp\u003eOEM-grade fit for the ICP\/Tempstar\/Heil WPH4304000RKA1 heat pump control circuit. Compatible with ICP-family systems using a 24V, 40VA control transformer. Verify primary voltage, secondary voltage, and VA rating against your existing transformer before installing.\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 breaker and verify zero voltage with a multimeter on both primary and secondary leads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the control compartment or electrical panel cover.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph the primary (line) and secondary (24V) wire connections before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Transfer the wires one at a time, then unbolt the old transformer from its mounting bracket.\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 24V across the secondary terminals and normal thermostat\/control operation.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eBlank thermostat and no low-voltage control response\u003c\/li\u003e\n\u003cli\u003eContactor and reversing valve coil won't energize\u003c\/li\u003e\n\u003cli\u003eNo measurable 24V on the secondary terminals\u003c\/li\u003e\n\u003cli\u003eRepeated blown control fuse from a shorted 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":63027203965299,"sku":"1176144-GEN","price":34.0,"currency_code":"USD","in_stock":true},{"title":"OEM","offer_id":63047946862963,"sku":"1176144","price":44.2,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-control-1176144_313e23c6-e339-4854-9ea0-b44226b6ab82.jpg?v=1782881991","url":"https:\/\/nationalhvacparts.com\/products\/icp-24v-transformer-for-wph4304000rka1-40va-control-transformer-ships-today-1","provider":"National HVAC Parts","version":"1.0","type":"link"}