{"product_id":"icp-24v-control-transformer-relay-kit-for-rhs181h0ba0aaaa-40va-24-volt-ships-today","title":"ICP 24V Control Transformer \u0026 Relay Kit for RHS181H0BA0AAAA — 40VA 24-Volt | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\u003cp\u003eThis OEM 24-volt control transformer and relay kit supplies low-voltage power to the control circuit of your ICP Tempstar\/Heil RHS181H0BA0AAAA heat pump. The 40VA transformer steps incoming line voltage down to the 24V needed by the thermostat, reversing-valve coil, contactor coils, and control board. Included are the reversing valve coil (1172619), a 24V DPDT relay (1183814, T92S11A22-24), and a 24V DPST relay (1178205, T92P7A22-24). When the transformer fails or a relay sticks, the system loses 24V control power — symptoms include a completely dead system, blown low-voltage fuse, chattering contactor, or a heat pump that will not switch between heating and cooling.\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\u003eOEM Part Numbers\u003c\/td\u003e\n\u003ctd\u003e1172619, 1183814, 1178205\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003e24V Control Transformer \u0026amp; Relay Kit\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\u003eRating\u003c\/td\u003e\n\u003ctd\u003e40 VA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage\u003c\/td\u003e\n\u003ctd\u003e24V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRelays\u003c\/td\u003e\n\u003ctd\u003eDPDT (T92S11A22-24), DPST (T92P7A22-24)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eEngineered as a direct OEM fit for the ICP Tempstar\/Heil RHS181H0BA0AAAA heat pump and related RHS181 series condensing units that use 24V control circuits.\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 all low-voltage wiring before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Disconnect the transformer\/relay leads and unscrew the failed component from its bracket.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Mount the new transformer\/relays and reconnect each lead exactly per your photo.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power and confirm a steady 24V at the secondary and proper relay pull-in.\u003c\/li\u003e\n\u003c\/ol\u003e\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eSystem completely dead with no 24V at the thermostat\u003c\/li\u003e\n\u003cli\u003eRepeatedly blown low-voltage fuse\u003c\/li\u003e\n\u003cli\u003eChattering or non-engaging contactor relay\u003c\/li\u003e\n\u003cli\u003eHeat pump won't switch between heating and cooling\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":63027261178227,"sku":"1172619","price":51.94,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":63047355892083,"sku":"1172619-GEN","price":39.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-control-1172619_712c91be-cd8a-491e-a6e6-77a6d3f8057b.jpg?v=1782881860","url":"https:\/\/nationalhvacparts.com\/products\/icp-24v-control-transformer-relay-kit-for-rhs181h0ba0aaaa-40va-24-volt-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}