{"product_id":"carrier-ch13na01800gaaaa-transformer-h4oyjb","title":"OEM Carrier Transformer 40VA 120V\/24V for CH13NA01800GAAAA","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V\/24V for Model CH13NA01800GAAAA\u003c\/h1\u003e\u003cp\u003eThis OEM replacement transformer (part# HT01AW229) is the factory-specified control circuit transformer for the \u003cstrong\u003eCarrier CH13NA01800GAAAA\u003c\/strong\u003e split-system condenser. The transformer steps down 120V line voltage to 24V AC to power the entire low-voltage control circuit — including the thermostat, contactor coil, and safety switches. When the transformer fails, the entire control system goes dark: the thermostat loses power, the contactor won't energize, and the system refuses to start. If you're measuring 0V at the R and C terminals on your control board with confirmed 120V line power present, a failed transformer is the most likely culprit.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | Primary: 120V AC | Secondary: 24V AC | OEM part number HT01AW229 | Direct factory replacement with correct mounting footprint and lead length\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact VA and voltage tolerances required by Carrier control boards. Undersized or off-tolerance generic transformers can overload, trip thermal cutoffs, and damage downstream components including the control board itself.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off all power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Label or photograph all wire connections before removing the old transformer. Confirm 24V output at secondary leads before reassembling the panel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. In stock and ships same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed as a direct OEM replacement for the Carrier \u003cstrong\u003eCH13NA01800GAAAA\u003c\/strong\u003e split-system condenser. Always verify the VA rating and primary\/secondary voltages on your existing transformer's label before ordering to confirm fitment. Our parts specialists are available to verify compatibility before you buy — no guesswork required.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909642473843,"sku":"CARRIE-CH13NA01800GAAAA-TRANSFORMER-HT01AW229","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909642506611,"sku":"CARRIE-CH13NA01800GAAAA-TRANSFORMER-HT01AW229-GEN","price":18.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-control-HT01AW229_aa0e2745-bf7c-4e38-86ac-66507ed7d741.jpg?v=1782940737","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ch13na01800gaaaa-transformer-h4oyjb","provider":"National HVAC Parts","version":"1.0","type":"link"}