OEM Carrier Transformer 208/230V–24V 40VA for Model PF1MNC019T00AAAA

This OEM Carrier transformer (part HT01CN241) is the factory-specified 40VA step-down transformer for the Carrier PF1MNC019T00AAAA fan coil / air handler unit. Its sole job is to convert line voltage (208/230V primary) down to the 24V signal voltage that powers your thermostat, control board, and every low-voltage relay in the system. When this transformer fails, the entire control circuit goes dark — the thermostat goes blank, the system won't respond to calls for heating or cooling, and no fault codes will appear because there is no power to generate them.

• Specs: 208/230V primary input | 24V secondary output | 40VA power rating | Direct OEM fit for Carrier PF1MNC019T00AAAA — no splicing or adapter harnesses required
• OEM vs Generic: The OEM HT01CN241 is wound and insulated to Carrier's exact thermal and electrical specifications. Generic 40VA transformers frequently run hot at sustained load, degrading insulation and causing nuisance failures. OEM is the only choice for a long-term fix.
• Install difficulty: 2/5 — Shut off all power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, a multimeter to confirm 24V output after install. Label or photograph all wiring before disconnecting. Total job time is typically 20–40 minutes for an experienced tech.
• Warranty: 1-year OEM manufacturer's warranty. In-stock orders ship same business day from our warehouse.

Compatibility: Engineered for the Carrier PF1MNC019T00AAAA fan coil/air handler. Confirm your unit's data plate shows a 208/230V primary transformer requirement before ordering. Not sure? Our fitment team verifies compatibility before you buy — reach out and we'll confirm the right part for your system.