{"product_id":"icp-2-pole-30a-40a-24v-contactor-for-rgs121hsca0aaa-oem-replacement-ships-today","title":"ICP 2-Pole 30A\/40A 24V Contactor for RGS121HSCA0AAA — OEM Replacement | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\u003cp\u003eThis OEM 2-pole definite-purpose contactor is the magnetic switch that powers the compressor and condenser fan circuit in your ICP \/ Tempstar \/ Heil RGS121HSCA0AAA system. A 24-volt signal from the thermostat energizes the coil, pulling the contacts closed to feed line voltage to the load. Available in the factory 30-amp (part 1178074) and 40-amp (part 1178211) ratings, both with a 24V coil. Contactors fail from pitted or welded contacts, a burned-out coil, or insects and debris holding the contacts open — symptoms include a system that won't start, chattering, or a compressor that runs continuously.\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\u003ePart Numbers\u003c\/td\u003e\n\u003ctd\u003e1178074 (30A), 1178211 (40A)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003e2-Pole Definite Purpose Contactor\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\u003eContact Rating\u003c\/td\u003e\n\u003ctd\u003e30A \/ 40A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoil Voltage\u003c\/td\u003e\n\u003ctd\u003e24V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePoles\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFits Model\u003c\/td\u003e\n\u003ctd\u003eRGS121HSCA0AAA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eDesigned for the ICP-family RGS121HSCA0AAA and the shared Tempstar, Heil, and Comfortmaker condensing units. Match your existing contactor's amperage and coil voltage before ordering — both common ratings are offered here.\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 disconnect and breaker. Verify zero voltage with a multimeter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the condensing unit electrical access panel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph all line, load, and coil wiring before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Label and disconnect the wires, then unbolt the old contactor from the bracket.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Mount the new contactor and reconnect each wire exactly per your photo.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power and confirm the contacts pull in on a cooling call with no chatter.\u003c\/li\u003e\n\u003c\/ol\u003e\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eSystem won't start or hums without engaging\u003c\/li\u003e\n\u003cli\u003eChattering or buzzing at the contactor\u003c\/li\u003e\n\u003cli\u003ePitted, burned, or welded contacts\u003c\/li\u003e\n\u003cli\u003eCompressor runs even after the thermostat is satisfied\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. Backed by the National HVAC Parts fitment guarantee.\u003c\/p\u003e","brand":"ICP","offers":[{"title":"Direct Replacement","offer_id":63027510870387,"sku":"1178074-GEN","price":34.0,"currency_code":"USD","in_stock":true},{"title":"OEM","offer_id":63047930806643,"sku":"1178074","price":44.2,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-contactor-2pole-1178074_244e6119-aa49-454e-b6c9-b7a476638da1.jpg?v=1782881195","url":"https:\/\/nationalhvacparts.com\/products\/icp-2-pole-30a-40a-24v-contactor-for-rgs121hsca0aaa-oem-replacement-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}