OEM Carrier Control Transformer 40VA 208/240V to 24V — Model PY3GPAA30060NA

This OEM control transformer is the factory-specified replacement for the Carrier PY3GPAA30060NA HVAC unit. Part number HT01BD209 steps down line voltage from 208/240V to a stable 24V output, powering the thermostat, control board, and all low-voltage control circuitry. When this transformer fails, the entire control circuit goes dead — symptoms include a blank thermostat, unresponsive controls, tripped fuses on the secondary side, or a system that simply won't respond to any call for heating or cooling.

• Specs: 40VA capacity | 208/240V primary input | 24V secondary output | 50/60 Hz | Class 2 control transformer | Foot-mount configuration
• OEM vs Generic: This is a genuine Carrier OEM part, manufactured to exact factory voltage and VA tolerances. Generic transformers frequently underperform on VA rating, causing nuisance tripping of secondary fuses and premature control board failures.
• Install difficulty: 2/5 — Disconnect power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Photograph all wiring connections before removing the old transformer. Verify 24V output with a multimeter after installation before restoring full system power.
• Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse.

Compatibility: Direct OEM replacement for Carrier model PY3GPAA30060NA. Also replaces superseded part numbers HT01BD207, HT01CN232, and 9076-00. Verify primary voltage (208V or 240V) against your unit's data plate before ordering. Need help confirming fitment? Our HVAC parts specialists verify compatibility before you buy — ships today when ordered before cutoff.