OEM Carrier Control Transformer 40VA 208/240V to 24V for Model PY2PNB030060AB

The Carrier HT01BD209 is the factory-specified 40VA step-down control transformer for the PY2PNB030060AB packaged unit. Its sole job is to convert 208/240V line voltage down to the 24V AC signal that powers the entire low-voltage control circuit — including the thermostat, contactor coil, gas valve, and control board. When this transformer fails, the result is complete and immediate: a blank thermostat, an unresponsive unit, and zero 24V signal at the secondary terminals. No transformer, no controls — full system lockout.

• Specs: 208/240V Primary | 24V Secondary | 40VA Power Rating | 50/60 Hz | Compact footprint: 3.5" L × 2.2" W × 1.9" H
• OEM vs Generic: This genuine Carrier OEM transformer is factory-wound to exact VA and impedance tolerances. Generic transformers often underdeliver VA capacity under load, causing nuisance board resets, brownouts on the 24V rail, and premature contactor coil failure. OEM is the only safe choice when the control circuit budget is tight.
• Install difficulty: 2/5 — Shut off all power to the unit before proceeding. Tools needed: multimeter (verify 0V before touching), flathead and Phillips screwdrivers, needle-nose pliers. Photograph all wire connections before disconnecting. Confirm 24VAC output at secondary terminals after installation before restoring thermostat calls.
• Warranty & Shipping: 1-year OEM manufacturer warranty. Ships same business day from our warehouse when ordered before cutoff. Replaces superseded part numbers HT01BD207, HT01CN232, and 9076-00.

Compatibility: Designed for Carrier model PY2PNB030060AB packaged units. Verify input voltage (208V or 240V) on your unit's data plate before ordering — this transformer supports both taps. Cross-references: HT01BD207, HT01CN232, 9076-00, 4000A46E07AE28. Questions about fitment? Our HVAC parts team verifies compatibility before you order — call or chat today.