{"product_id":"icp-transformer-for-rgs240htfa0aaaa-24v-40va-control-power-ships-today","title":"ICP Transformer for RGS240HTFA0AAAA — 24V 40VA Control Power | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\u003cp\u003eThis is the genuine OEM 24V control transformer and relay assembly for the ICP \/ Heil \/ Tempstar RGS240HTFA0AAAA gas furnace. The transformer steps the incoming line voltage down to the 24-volt control signal that powers the furnace control board, thermostat, gas valve, and the included 24V relays (OEM 1183814 DPDT relay T92S11A22-24 and 1178205 DPST relay T92P7A22-24). Rated at 40VA, it delivers stable, regulated low-voltage power to the entire control circuit. When a transformer fails, the furnace goes completely dead at the thermostat — no call for heat, no blower, no ignition sequence — even though line power is present. A buzzing transformer, a tripped low-voltage fuse, or a melted secondary winding are classic signs of a failed unit, often caused by a shorted thermostat wire or a stuck relay coil drawing excess current.\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\u003e1183814, 1178205\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eStep-Down Control Transformer w\/ Relays\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eICP \/ Heil \/ Tempstar\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 1\u003c\/td\u003e\n\u003ctd\u003e24V DPDT (T92S11A22-24)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRelay 2\u003c\/td\u003e\n\u003ctd\u003e24V DPST (T92P7A22-24)\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\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eEngineered as a direct-fit replacement for the ICP RGS240HTFA0AAAA gas furnace and shared platform models across the Heil, Tempstar, and Comfortmaker family that use the same 40VA control transformer and 24V relay set. Always confirm the printed part number on your existing component before ordering.\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 furnace switch and breaker, then 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 all primary and secondary wiring before disconnecting anything.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Unplug the relay sockets, disconnect the transformer primary and secondary leads, and unbolt the assembly from the panel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Mount the new transformer, seat the relays, and reconnect every lead exactly per your photo.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power, confirm 24V across the secondary, and run a full heat cycle.\u003c\/li\u003e\n\u003c\/ol\u003e\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eFurnace is completely unresponsive at the thermostat\u003c\/li\u003e\n\u003cli\u003eRepeatedly blown low-voltage control fuse\u003c\/li\u003e\n\u003cli\u003eAudible buzzing, humming, or a burnt smell from the control box\u003c\/li\u003e\n\u003cli\u003eRelays chatter or fail to pull in during a call for heat\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. National HVAC Parts fitment guarantee.\u003c\/p\u003e","brand":"ICP","offers":[{"title":"OEM","offer_id":63027304628595,"sku":"1183814","price":42.84,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":63047725842803,"sku":"1183814-GEN","price":32.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-control-1183814_7f5236a7-2c2a-46e8-836d-b10d49aeb2ae.jpg?v=1782896099","url":"https:\/\/nationalhvacparts.com\/products\/icp-transformer-for-rgs240htfa0aaaa-24v-40va-control-power-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}