OEM Carrier Control Transformer 40VA 120V to 24V for Model U19X150U60A — Part HT01CN001

This is the factory OEM replacement control transformer for the Carrier U19X150U60A, supplied under Carrier part number HT01CN001. The transformer steps down 120V line voltage to a safe 24V (with 12V tap) to power the entire low-voltage control circuit — including the thermostat, control board, and safety switches. When this transformer fails, the entire control system loses power: the thermostat goes blank, the system refuses to respond to any command, and you may detect a faint burning smell or hear a faint buzz near the air handler or furnace cabinet.

• Specs: 40VA rated | 120V primary | 12V/24V dual secondary | Factory-matched OEM tolerance | Replaces superseded part numbers HT01BJ115, 19EA41612, 19EA42612
• OEM vs Generic: The OEM HT01CN001 is wound and potted to Carrier's exact factory specifications, ensuring correct VA capacity and thermal protection. Generic transformers may be underrated in VA, causing premature overload failures when multiple 24V accessories (humidifiers, UV lights, zoning panels) are connected.
• Install difficulty: 3/5 — Shut off all power at the breaker before starting. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to verify 24V output after install), wire labels or tape. Document all low-voltage wiring connections before disconnecting. Check for any short circuits in the 24V wiring before powering up the new transformer — a downstream short is the #1 cause of repeat transformer failures.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed as a direct OEM replacement for the Carrier U19X150U60A. Always verify your unit's data plate voltage requirements match the 120V primary / 24V secondary specification before ordering. If you're unsure of fitment, our HVAC parts specialists are standing by to verify compatibility before you buy — order with confidence.