{"product_id":"icp-40va-24v-transformer-for-rgs303hsaa0aaaa-oem-furnace-control-transformer-ships-today","title":"ICP 40VA 24V Transformer for RGS303HSAA0AAAA – OEM Furnace Control Transformer | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThis OEM control transformer is the 24V power source for the ICP \/ Tempstar \/ Heil RGS303HSAA0AAAA gas furnace control circuit. It steps 120V line voltage down to the 24V needed by the control board, thermostat, gas valve, and 24V relays such as OEM parts 1183814 (24V DPDT, T92S11A22-24) and 1178205 (24V DPST, T92P7A22-24). A failed transformer leaves the entire low-voltage control system dead. Common failure causes include shorted thermostat wiring, a seized inducer or blower drawing excess current, or simple age-related winding burnout. Typical symptoms are a blown control fuse, no 24V at the board, a non-responsive thermostat, or a faint burnt-electrical odor near the transformer.\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\u003ePrimary Voltage\u003c\/td\u003e\n\u003ctd\u003e120V\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\u003eAssociated 24V Relays\u003c\/td\u003e\n\u003ctd\u003e1183814 (DPDT), 1178205 (DPST)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eFurnace Low-Voltage Control Circuit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFitment\u003c\/td\u003e\n\u003ctd\u003eOEM Direct 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\u003eBuilt for the ICP \/ Tempstar \/ Heil RGS303HSAA0AAAA gas furnace and related models using the same 24V control circuit and relay set. Confirm primary\/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 switch and breaker; verify zero voltage with a multimeter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e – Remove the furnace control-compartment service panel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e – Photograph the primary and secondary lead connections before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e – Disconnect the leads, remove the mounting screws, and take out the old transformer.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e – Mount the new transformer, reconnect the 120V primary and 24V secondary leads per your photo.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e – Restore power and confirm 24V at the secondary and normal 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\u003eNo 24V output and a completely dead control circuit.\u003c\/li\u003e\n\u003cli\u003eRepeatedly blown low-voltage control fuse.\u003c\/li\u003e\n\u003cli\u003eThermostat and control board unresponsive despite 120V line power.\u003c\/li\u003e\n\u003cli\u003eBurnt smell, discoloration, or audible buzzing from the 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":63027275202931,"sku":"1183814-GEN","price":29.95,"currency_code":"USD","in_stock":true},{"title":"OEM","offer_id":63047950401907,"sku":"1183814","price":38.94,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-control-1183814_f068d05a-b6ae-4a83-b539-7532fbcbfc67.jpg?v=1782882308","url":"https:\/\/nationalhvacparts.com\/products\/icp-40va-24v-transformer-for-rgs303hsaa0aaaa-oem-furnace-control-transformer-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}