OEM Carrier Control Transformer 208/230V–24V 40VA for Model PF4MNB049000ABAA

This OEM Carrier transformer (part number HT01CN241) is the factory-specified 24V control circuit transformer for the Carrier PF4MNB049000ABAA air handler. Its job is to step down the 208/230V line voltage to the 24V AC signal that powers your thermostat, control board, relays, and zone valves. When this transformer fails, the entire low-voltage control circuit goes dead — the thermostat goes blank, the system won't respond to any call for heating or cooling, and no fan or compressor operation is possible. It is one of the first components to check when an HVAC system shows zero control response.

• Specs: 208/230V primary | 24V secondary | 40VA capacity | Foot-mount configuration | Factory-matched to Carrier PF4MNB049000ABAA specifications
• OEM vs Generic: OEM transformers are wound to exact VA and voltage tolerances, protecting sensitive control boards from voltage fluctuations. Undersized or off-tolerance generic transformers can overheat, trip internal breakers, or damage downstream board components.
• Install difficulty: 2/5 — Turn off all power at the disconnect and breaker before starting. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to verify 24V output after install). Label all low-voltage wires before disconnecting. The transformer mounts to the blower deck or control bracket with two screws.
• Warranty: 1-year OEM manufacturer warranty. In-stock units ship same business day from our warehouse.

Compatibility: Designed for the Carrier PF4MNB049000ABAA air handler. Verify your unit's data plate shows a 208/230V primary and 24V/40VA secondary requirement before ordering. This part also crosses to related ICP-family air handlers sharing the HT01CN241 specification. Our fitment team is available to confirm compatibility before you order — same-day shipping on all in-stock orders.