OEM Carrier Control Transformer 40VA 208/230V→24V for Model PF4MNB049000AAAA

This is the genuine OEM Carrier control transformer (part #HT01CN241) factory-specified for the Carrier PF4MNB049000AAAA fan coil and air handler. The transformer steps down line voltage (208/230V primary) to the 24V AC signal that powers your thermostat, control board, and all low-voltage components. When this transformer fails, the entire control circuit goes dead — the thermostat goes blank, the system refuses to respond to any call for heating or cooling, and no low-voltage components operate. In some cases a failed transformer will trip a fuse or breaker on the secondary circuit, which is a telltale sign this part needs replacement.

• Specs: 208/230V Primary | 24V Secondary | 40VA Rating | OEM Part #HT01CN241 | Factory-matched to Carrier PF4MNB049000AAAA
• OEM vs Generic: Genuine Carrier OEM transformers are wound to exact VA and voltage tolerances. Undersized or off-spec aftermarket units can brown out control boards, cause erratic thermostat behavior, or fail prematurely under full control-circuit load.
• Install difficulty: 2/5 — Shut off power at the breaker before proceeding. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to verify 24V output after install). Label all low-voltage wires before disconnecting. Verify fuse on secondary side is intact after replacement.
• Warranty: 1-year OEM manufacturer warranty. In-stock units ship same business day when ordered by cutoff time.

Compatibility: Designed as a direct OEM replacement for the Carrier PF4MNB049000AAAA fan coil/air handler unit. Confirm your unit's data plate lists a 208/230V primary and 24V/40VA secondary before ordering. Need fitment verification? Our HVAC parts specialists confirm compatibility before your order ships — no guesswork, no returns.