{"product_id":"icp-24v-control-transformer-for-rhs150s0aa0aaaa-40va-reversing-valve-circuit-ships-today","title":"ICP 24V Control Transformer for RHS150S0AA0AAAA — 40VA Reversing Valve Circuit | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\u003cp\u003eThis OEM 24-volt control transformer supplies low-voltage power to the control circuit of the ICP \/ Tempstar \/ Heil RHS150S0AA0AAAA heat pump, including the reversing-valve coil (PN 1172619), the 24V DPDT changeover relay (PN 1183814), and the reversing valve assembly (PN 1175367). The transformer steps line voltage down to a stable 24VAC at 40VA so the contactor, defrost board, and reversing valve receive clean, regulated control power. When a transformer fails, the entire low-voltage circuit goes dead — the system will not energize the contactor, the thermostat screen may go blank, and heating\/cooling calls produce no response. Common failure causes are a shorted reversing-valve coil drawing excess current, a wiring short, or age-related insulation breakdown.\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 Type\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\u003eRelated OEM Parts\u003c\/td\u003e\n\u003ctd\u003e1172619, 1183814, 1175367\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\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eEngineered for the ICP RHS150S0AA0AAAA heat pump and shared-platform RHS150-series units sold under the Tempstar, Heil, and Comfortmaker brands. Always confirm your existing transformer's primary and secondary voltage 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 verify zero voltage with a multimeter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the control-panel service cover.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph every primary and secondary lead before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Label and disconnect the transformer leads, then unbolt the transformer from the panel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Mount the new transformer and reconnect each lead per your photo.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power and confirm 24VAC across the secondary terminals.\u003c\/li\u003e\n\u003c\/ol\u003e\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eNo 24V output — contactor and reversing valve will not energize\u003c\/li\u003e\n\u003cli\u003eBlank or dead thermostat with line power present\u003c\/li\u003e\n\u003cli\u003eRepeatedly blown low-voltage fuse\u003c\/li\u003e\n\u003cli\u003eBurnt smell or visible scorching on the transformer body\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":63021864190323,"sku":"1172619","price":36.4,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":63047355957619,"sku":"1172619-GEN","price":28.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-control-1172619_8d6c3d57-709b-4c50-9a67-34dd49b832b1.jpg?v=1782881872","url":"https:\/\/nationalhvacparts.com\/products\/icp-24v-control-transformer-for-rhs150s0aa0aaaa-40va-reversing-valve-circuit-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}