{"product_id":"carrier-pf4mna042000aaaa-transformer-h3hwwy","title":"OEM Carrier Transformer 40VA 24V for PF4MNA042000AAAA","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer HT01CN241 for Model PF4MNA042000AAAA\u003c\/h1\u003e\u003cp\u003eThis OEM control transformer is the factory-specified replacement part \u003cstrong\u003eHT01CN241\u003c\/strong\u003e for the \u003cstrong\u003eCarrier PF4MNA042000AAAA\u003c\/strong\u003e fan coil air handler unit. The transformer steps down 120V line voltage to the 24V AC signal that powers your thermostat circuit, control board, and all low-voltage control wiring. When it fails, the entire control circuit goes dead — your thermostat loses power, the system stops responding, and no heating or cooling operation is possible.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Input: 120V AC | Output: 24V AC | 40VA rated capacity | Direct OEM replacement for part number HT01CN241 | Factory-matched windings and mounting footprint\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's control board. Under-rated or off-tolerance aftermarket units can damage sensitive electronics on the IFC board or cause nuisance tripping of the fuse on the control circuit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Always shut off power at the breaker and confirm voltage is zero with a multimeter before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or quick-connects. Label all 24V wires before disconnecting the old unit. Verify the fuse on the control board is intact before assuming the transformer is the failure point.\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 specifically for the Carrier \u003cstrong\u003ePF4MNA042000AAAA\u003c\/strong\u003e fan coil air handler (3.5-ton nominal). Always verify your unit's data plate voltage and VA requirements match before ordering. Our parts specialists are available to confirm fitment — contact us before you order if you have any questions.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62643294503283,"sku":"CARRIE-PF4MNA042000AAAA-TRANSFORMER-HT01CN241","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62643294536051,"sku":"CARRIE-PF4MNA042000AAAA-TRANSFORMER-HT01CN241-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-HT01CN241_b70fe010-5cd0-422e-9a5d-d894adcf1171.jpg?v=1782942659","url":"https:\/\/nationalhvacparts.com\/products\/carrier-pf4mna042000aaaa-transformer-h3hwwy","provider":"National HVAC Parts","version":"1.0","type":"link"}