{"product_id":"icp-40va-control-transformer-for-rgs240hsaa0aaaa-120-24v-ships-today","title":"ICP 40VA Control Transformer for RGS240HSAA0AAAA — 120\/24V | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThis OEM control transformer assembly supplies the low-voltage 24V power that runs the entire control circuit on your ICP \/ Tempstar \/ Heil RGS240HSAA0AAAA gas furnace. It steps line voltage (120V) down to 24V and feeds the relays, gas valve, igniter circuit, and thermostat. Included OEM relays — part 1183814 (24V DPDT, T92S11A22-24) and 1178205 (24V DPST, T92P7A22-24) — switch the blower and inducer loads on command from the control board. When the transformer or its companion relays fail, the furnace goes completely dead: no blower, no ignition sequence, and a thermostat that simply will not call. A buzzing transformer, blown low-voltage fuse, or burnt relay contacts are the classic failure symptoms. Replacing with the correct OEM 40VA part restores reliable, code-compliant operation.\u003c\/p\u003e\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\u003ePart Numbers\u003c\/td\u003e\n\u003ctd\u003e1183814 (Relay 24V DPDT), 1178205 (Relay 24V DPST)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eControl Transformer \/ Relay Set\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\u003e40VA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRelay Config\u003c\/td\u003e\n\u003ctd\u003eDPDT (T92S11A22-24) \u0026amp; DPST (T92P7A22-24)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cp\u003eEngineered for the ICP RGS240HSAA0AAAA gas furnace and shared across many Tempstar, Heil, Comfortmaker, and Arcoaire RGS-series models that use the same 24V control architecture. Always confirm the OEM part number on your existing component before ordering.\u003c\/p\u003e\n\u003ch3\u003eInstallation Guide\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eSafety First\u003c\/strong\u003e — Disconnect power at the furnace 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\/burner 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 — Unplug the low-voltage leads, release the transformer\/relay mounting screws, and lift the old component out.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Mount the new transformer and relays, reconnect each lead exactly per your photo.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power, confirm 24V at the secondary and a normal heat call sequence.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eFurnace is completely unresponsive — no blower, no ignition.\u003c\/li\u003e\n\u003cli\u003eRepeatedly blown 3-amp low-voltage control fuse.\u003c\/li\u003e\n\u003cli\u003eAudible buzzing or burning smell from the control area.\u003c\/li\u003e\n\u003cli\u003eRelay contacts pitted, stuck, or chattering.\u003c\/li\u003e\n\u003c\/ul\u003e\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":63027309150579,"sku":"1183814-GEN","price":34.0,"currency_code":"USD","in_stock":true},{"title":"OEM","offer_id":63047950500211,"sku":"1183814","price":44.2,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-control-1183814_37cdcd93-c33a-4b17-b6fe-bc47460f5597.jpg?v=1782882316","url":"https:\/\/nationalhvacparts.com\/products\/icp-40va-control-transformer-for-rgs240hsaa0aaaa-120-24v-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}