OEM Carrier Control Transformer 40VA 120V/24V for Model PF1MNC025T00AAAA

This is the factory OEM replacement transformer (part number HT01CN241) for the Carrier PF1MNC025T00AAAA fan coil unit. The transformer steps down line voltage (120V) to low-voltage control power (24V) to energize your thermostat, control board, and all 24V control circuit components. When this transformer fails, the entire control circuit goes dead — the thermostat loses power, relays won't energize, and the system will not respond to any heating or cooling calls. A failed transformer is often confirmed by measuring 0V on the 24V secondary while line voltage is present at the primary.

• Specs: Input: 120V AC | Output: 24V AC | VA Rating: 40VA | OEM Part Number: HT01CN241 | Factory-matched to Carrier PF1MNC025T00AAAA wiring harness
• OEM vs Generic: OEM transformers use factory-spec copper windings and Class B insulation rated for HVAC duty cycles. Generic alternatives may use undersized wire gauges that overheat under sustained 24V load, risking nuisance tripping or early failure.
• Install Difficulty: 2/5 — Requires disconnecting line-voltage wiring; always shut off power at the disconnect and breaker before servicing. Tools needed: flat-head and Phillips screwdrivers, needle-nose pliers, multimeter to verify 24V output after installation.
• Warranty: Backed by a 1-year OEM factory warranty. Orders placed before cutoff ship same business day from our stocked warehouse.

Compatibility: Designed and factory-specified for the Carrier PF1MNC025T00AAAA fan coil unit. Cross-reference OEM part number HT01CN241 against your unit's data plate or wiring diagram before ordering. Our fitment team is available to confirm compatibility before you purchase — no guesswork required.