{"product_id":"icp-40va-transformer-for-rhs048h0ba0aaaa-24v-control-ships-today","title":"ICP 40VA Transformer for RHS048H0BA0AAAA — 24V Control | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\u003cp\u003eThis OEM control component (part 1175367) supplies the 24-volt control circuit for the ICP \/ Tempstar \/ Heil RHS048H0BA0AAAA. A control transformer steps line voltage down to the 24VAC needed by the thermostat, contactor coil, reversing-valve solenoid, and control board. Rated at 40VA, it provides enough capacity to hold all low-voltage loads pulled in at once. When a transformer fails — usually from a shorted secondary or a surge — the entire control circuit goes dead: the thermostat blanks, the contactor won't pull in, and the system won't respond to a call. \u003cstrong\u003eNote:\u003c\/strong\u003e the OEM description for 1175367 reads \"VALVE REV W\/ COIL 24V,\" which indicates a reversing-valve coil; confirm the correct part before ordering against this transformer listing.\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\u003e1175367\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eControl Transformer\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\u003eRating\u003c\/td\u003e\n\u003ctd\u003e40 VA\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\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\u003eIntended for the ICP RHS048H0BA0AAAA 4-ton heat pump and equivalent Tempstar, Heil, and Comfortmaker units using the 1175367 number. Verify primary voltage and 24V secondary rating against your existing transformer before installing.\u003c\/p\u003e\u003ch3\u003eInstallation Guide\u003c\/h3\u003e\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eSafety First\u003c\/strong\u003e — Disconnect power and verify zero voltage with a multimeter on both primary and secondary leads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the control-box service panel to expose the transformer.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph the primary and 24V secondary wiring before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Disconnect the leads, unbolt the transformer from the control box, and lift it out.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Mount the new transformer and 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 a steady 24VAC across the secondary and that the system responds to a thermostat call.\u003c\/li\u003e\n\u003c\/ol\u003e\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eNo 24V at the control board or thermostat.\u003c\/li\u003e\n\u003cli\u003eThermostat screen is blank with line power present.\u003c\/li\u003e\n\u003cli\u003eRepeated blown low-voltage fuses or a burnt-smelling transformer.\u003c\/li\u003e\n\u003cli\u003eContactor and controls won't energize on a call.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eShipping \u0026amp; Returns\u003c\/h3\u003e\u003cp\u003eShips same day on orders placed 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":63021926023539,"sku":"1175367","price":45.44,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":63047374111091,"sku":"1175367-GEN","price":34.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-control-1175367_b18a953d-5029-43a5-ae13-67ae1f74b9d4.jpg?v=1782882437","url":"https:\/\/nationalhvacparts.com\/products\/icp-40va-transformer-for-rhs048h0ba0aaaa-24v-control-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}