{"product_id":"icp-24v-transformer-for-rgs240hdea0aaaa-40va-control-circuit-ships-today","title":"ICP 24V Transformer for RGS240HDEA0AAAA — 40VA Control Circuit | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThis OEM 24-volt control transformer assembly supplies low-voltage power to the control circuit of your ICP \/ Tempstar \/ Heil RGS240HDEA0AAAA gas furnace. It steps line voltage down to a stable 24V secondary and includes the matched DPDT and DPST control relays (OEM 1183814 \/ 1178205) that switch the blower, ignition, and gas-valve circuits on demand. When the control transformer or its companion relays fail, the furnace loses 24V power entirely — the thermostat goes dead, the blower will not energize, and no call for heat is answered. Replacing it with the factory-spec part restores correct 40VA capacity and clean switching without nuisance lockouts.\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\u003eOEM Part Numbers\u003c\/td\u003e\n\u003ctd\u003e1183814 (Relay 24V DPDT T92S11A22-24), 1178205 (Relay 24V DPST T92P7A22-24)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003e24V Control Transformer \/ Relay Set\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\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\u003eEngineered as a direct OEM fit for the ICP \/ Tempstar \/ Heil RGS240HDEA0AAAA furnace platform and shared RGS240-series control assemblies. Always confirm your existing part number against the unit's wiring diagram and rating plate before ordering.\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 furnace switch and breaker; verify zero voltage with a multimeter before touching wiring.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the furnace control\/service panel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph every wire and terminal position on the transformer and relays before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Label and disconnect the primary and 24V secondary leads, then unbolt the transformer and unclip the relays from the control rail.\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 24VAC at the secondary, and run a full heat cycle.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eDead thermostat with no 24V control power present\u003c\/li\u003e\n\u003cli\u003eBlower or gas valve will not energize on a call for heat\u003c\/li\u003e\n\u003cli\u003eTripped or blown low-voltage fuse \/ overheated transformer body\u003c\/li\u003e\n\u003cli\u003eBuzzing, chattering, or intermittent relay switching\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":63027313607027,"sku":"1183814-GEN","price":28.0,"currency_code":"USD","in_stock":true},{"title":"OEM","offer_id":63047945388403,"sku":"1183814","price":36.4,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-control-1183814_fa7c78a9-3cb2-403c-b76a-228f47beae12.jpg?v=1782881896","url":"https:\/\/nationalhvacparts.com\/products\/icp-24v-transformer-for-rgs240hdea0aaaa-40va-control-circuit-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}