{"product_id":"icp-24v-transformer-for-rhs090l0bb0aaaa-40va-class-2-ships-today","title":"ICP 24V Transformer for RHS090L0BB0AAAA — 40VA Class 2 | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThis OEM 24-volt control transformer supplies low-voltage power to the ICP Tempstar Heil RHS090L0BB0AAAA heat pump. It steps incoming line voltage down to a clean 40VA, 24VAC output that drives the thermostat, contactor coil, reversing-valve solenoid, and defrost board. When this transformer fails, the entire system goes dark — no display, no contactor engagement, and no compressor or fan operation. Manufactured to OEM specification, it fits the original mounting bracket and restores full control-circuit power. Associated low-voltage parts on this model include reversing-valve coil 1172619, relay 1178205, and reversing valve assemblies 1175367 and 1190263.\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\u003eCompatible Part Numbers\u003c\/td\u003e\n\u003ctd\u003e1172619, 1178205, 1175367, 1190263\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\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, Class 2\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\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cp\u003eDesigned for the ICP Tempstar Heil RHS090L0BB0AAAA heat pump and shared across many ICP-family RHS-series units. Confirm the 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.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the control-panel service panel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph all primary and secondary wire connections before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Disconnect the line-voltage primary and 24V secondary leads, then unbolt the old transformer.\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 24VAC across the secondary terminals.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCompletely dead system — no thermostat display\u003c\/li\u003e\n\u003cli\u003eContactor and reversing valve will not energize\u003c\/li\u003e\n\u003cli\u003eRepeatedly blown low-voltage fuse\u003c\/li\u003e\n\u003cli\u003eNo measurable 24VAC at the secondary terminals\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. National HVAC Parts fitment guarantee.\u003c\/p\u003e","brand":"ICP","offers":[{"title":"Direct Replacement","offer_id":63021887848819,"sku":"1172619-GEN","price":29.95,"currency_code":"USD","in_stock":true},{"title":"OEM","offer_id":63047945716083,"sku":"1172619","price":38.94,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-control-1172619_2f88b9bf-581d-480c-90d0-90c3af33ed95.jpg?v=1782881918","url":"https:\/\/nationalhvacparts.com\/products\/icp-24v-transformer-for-rhs090l0bb0aaaa-40va-class-2-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}