{"product_id":"icp-transformer-for-rgs240hraa0aaaa-40va-24v-control-ships-today","title":"ICP Transformer for RGS240HRAA0AAAA — 40VA 24V Control | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThis OEM 24-volt control assembly supplies low-voltage power to the control circuit of your ICP \/ Tempstar \/ Heil RGS240HRAA0AAAA rooftop gas-electric unit. The 40VA transformer steps the 208\/240V line voltage down to the 24V secondary that powers the thermostat, ignition control, and switching relays. Included in this control group are the 24V switching relays (OEM 1183814 DPDT and 1178205 DPST) that energize the blower and auxiliary loads on a call for heat or cool. When a transformer or relay fails, the entire low-voltage circuit goes dead — the unit will not respond to the thermostat, the contactor will not pull in, and you will read 0 volts across the R and C terminals.\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\u003eControl Transformer \/ 24V Switching Relays\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\u003eRating\u003c\/td\u003e\n\u003ctd\u003e40 VA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary Voltage\u003c\/td\u003e\n\u003ctd\u003e208\/240V\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\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cp\u003eEngineered for the ICP \/ Tempstar \/ Heil RGS240HRAA0AAAA rooftop gas-electric package unit and other RGS240-series cabinets that use the same 24V control architecture. Always confirm your existing part number 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 unit disconnect and verify zero voltage with a multimeter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the control-access service panel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph every low-voltage wire and terminal before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Label and pull the leads from the failed transformer\/relay, then unscrew it from the mounting bracket.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Mount the new component and reconnect each lead exactly per your photo.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power and confirm 24V across R–C and proper relay pull-in on a thermostat call.\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 at the thermostat or control board (0V across R and C)\u003c\/li\u003e\n\u003cli\u003eUnit completely unresponsive to thermostat calls\u003c\/li\u003e\n\u003cli\u003eContactor or blower relay will not energize\u003c\/li\u003e\n\u003cli\u003eBuzzing, scorched, or visibly burned transformer\/relay housing\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":"OEM","offer_id":63027312689523,"sku":"1183814","price":32.44,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":63047725777267,"sku":"1183814-GEN","price":24.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-control-1183814_8bdcd2fd-37fd-4af0-964d-db9834b39294.jpg?v=1782896097","url":"https:\/\/nationalhvacparts.com\/products\/icp-transformer-for-rgs240hraa0aaaa-40va-24v-control-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}