OEM Carrier Transformer 40VA 120V/24V for Model PF4MNA061T00AAAA

This is the factory OEM replacement transformer (part number HT01CN241) for the Carrier PF4MNA061T00AAAA air handler. The transformer is the heartbeat of your HVAC control circuit — it steps down line voltage (120V) to the 24V signal voltage that powers your thermostat, control board, and all low-voltage switching components. When this part fails, absolutely nothing in the system will respond: the thermostat goes dark, the contactor won't pull in, and the system sits completely unresponsive. A failed transformer is one of the most common and straightforward repairs in the field.

• Specs: 120V primary | 24V secondary | 40VA output rating | Factory-matched OEM tolerances | Designed for Carrier air handler control circuits
• OEM vs Generic: This is a genuine Carrier OEM transformer, identical to what was installed at the factory. Generic transformers may carry a similar VA rating but often use lower-grade core laminations that run hotter and fail sooner — especially in high-duty-cycle applications. OEM is always the recommended choice for control transformers.
• Install difficulty: 2/5 — Shut off all power to the air handler before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter (to confirm 24V output after install). Note primary and secondary wiring colors before disconnecting the old unit. Takes most technicians under 20 minutes.
• Warranty: 1-year OEM factory warranty against defects. Orders placed before cutoff ship same business day from our warehouse.

Compatibility: Designed specifically for the Carrier PF4MNA061T00AAAA air handler. Always verify the transformer's VA rating and voltage markings on your unit's wiring diagram or data plate before ordering. Not sure if this fits your exact configuration? Our HVAC parts specialists verify fitment before every order — reach out before you buy.