OEM Carrier 40VA Control Transformer HT01CN241 for Model PF4MNA030000AAAA

This is the factory-specified OEM control transformer for the Carrier PF4MNA030000AAAA air handler. The transformer steps line voltage (208/230V primary) down to the 24V signal that powers your thermostat, control board, contactor coil, and every other low-voltage component in the system. When it fails, the entire control circuit goes dark — you'll find a completely unresponsive thermostat, a tripped 3A fuse, or a system that won't call for heating or cooling at all despite power being present at the unit.

• Specs: 40VA power rating | 208/230V primary input | 24V secondary output | Direct OEM drop-in replacement | Part number HT01CN241
• OEM vs Generic: This is a genuine Carrier Factory Authorized Part engineered to exact specification. Generic transformers often use undersized windings that run hot, blow fuses repeatedly, and fail within one season — costing far more in callbacks than the modest price difference.
• Install difficulty: 2/5 — Shut off power at the disconnect and breaker before touching any wiring. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to verify 24V output after install). Photograph all wire connections before removal. The transformer mounts to the blower compartment panel and connects via quick-connect spade terminals on most configurations.
• Warranty: 1-year OEM manufacturer's warranty. In-stock units ship same business day when ordered before cutoff.

Compatibility: Engineered specifically for the Carrier PF4MNA030000AAAA air handler. Verify your unit's data plate shows a 208/230V primary and 24V secondary control circuit before ordering. If you are unsure of fitment, our parts specialists can verify compatibility before you purchase — contact us before you order.