OEM Carrier Transformer 60VA 230-24V for Model FD3ANA024075AAAA

This OEM step-down transformer (part# HT01AW230) is the factory-specified replacement for the Carrier FD3ANA024075AAAA air handler. The transformer converts 230V line voltage down to the 24V AC signal that powers your thermostat, control board, and all low-voltage control circuits. When this component fails, nothing in the system responds — the thermostat goes blank, the air handler won't respond to calls for heating or cooling, and no error codes appear because the control board itself has lost power. A failed transformer is often misdiagnosed as a bad control board, making correct identification critical before spending more on parts.

• Specs: 60VA rated output | 230V primary input | 24V secondary output | Factory-matched OEM tolerances for stable low-voltage control circuit performance
• OEM vs Generic: OEM transformers like this HT01AW230 are wound and rated to exact factory VA specifications. Undersized or off-tolerance generic units can overheat, blow the control fuse, or deliver unstable 24V signal — damaging your thermostat or control board downstream.
• Install difficulty: 2/5 — Disconnect power at the breaker before beginning. Tools needed: flathead and Phillips screwdriver, multimeter (verify 0V before touching terminals, and confirm 24V output after install). Always check for a blown 3A or 5A control fuse before replacing the transformer, as a shorted load will take out a new unit immediately.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed specifically for the Carrier FD3ANA024075AAAA air handler. Verify your existing transformer's VA rating, primary voltage (230V), and secondary voltage (24V) on the data plate or old unit before ordering. Need help confirming fitment? Our HVAC parts specialists verify compatibility before you purchase — no guesswork required.