{"product_id":"icp-24vac-relay-transformer-for-sup18m2301cia-l01h009-ships-today","title":"ICP 24VAC Relay Transformer for SUP18M2301CIA — L01H009 | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\u003cp\u003eThis is the genuine ICP\/Tempstar\/Heil 24VAC control relay (OEM part L01H009, AG90-23242-024W) used in the low-voltage control circuit of the SUP18M2301CIA. The relay switches 24-volt signals from the thermostat and control board to energize the unit's higher-voltage loads such as the contactor coil and fan circuit. When this relay fails, the system loses the ability to reliably make or break those control connections — leading to a unit that will not start, will not stage properly, or that chatters and short-cycles. Replacing it with the correct OEM relay restores precise, dependable switching rated for the exact 24VAC coil voltage the equipment expects.\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 Number\u003c\/td\u003e\n\u003ctd\u003eL01H009 (AG90-23242-024W)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eControl Relay\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\u003eCoil Voltage\u003c\/td\u003e\n\u003ctd\u003e24 VAC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFit\u003c\/td\u003e\n\u003ctd\u003eOEM Replacement\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eDesigned as a direct OEM-fit replacement for the ICP SUP18M2301CIA and other Tempstar\/Heil\/Comfortmaker units that share the same 24VAC control platform. Always confirm the printed part number on your existing relay 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 breaker and verify zero voltage with a multimeter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the unit's electrical service panel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph all wire terminations before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Note coil and contact terminal positions, then unplug or unscrew the failed relay from its mounting clip or track.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Seat the new relay, reconnect each lead to the matching terminal per your photo.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power and confirm the relay energizes on a call for cooling\/heating.\u003c\/li\u003e\n\u003c\/ol\u003e\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eUnit will not start even though the thermostat is calling.\u003c\/li\u003e\n\u003cli\u003eAudible chatter, buzzing, or rapid clicking from the control area.\u003c\/li\u003e\n\u003cli\u003eIntermittent operation or short-cycling.\u003c\/li\u003e\n\u003cli\u003eBurned, pitted, or melted relay contacts on inspection.\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":63021832241523,"sku":"L01H009-GEN","price":24.0,"currency_code":"USD","in_stock":true},{"title":"OEM","offer_id":63047947551091,"sku":"L01H009","price":31.2,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-control-L01H009_5c447e3b-869e-44a3-b52f-cbfa9bb5016d.jpg?v=1782882066","url":"https:\/\/nationalhvacparts.com\/products\/icp-24vac-relay-transformer-for-sup18m2301cia-l01h009-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}