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OEM Carrier Control Transformer 40VA 208/240V–24V for PY3GNA030060AA
Carrier

OEM Carrier Control Transformer 40VA 208/240V–24V for PY3GNA030060AA

SKU: CARRIE-PY3GNA030060AA-TRANSFORMER-HT01BD209 Brand: Carrier
✓ Guaranteed to fit PY3GNA030060AA — or your money back. Terms

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Texas CMBL #19328542014
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OEM Carrier Control Transformer 40VA 208/240V to 24V — HT01BD209 for Model PY3GNA030060AA

This is the genuine OEM Carrier control transformer (part number HT01BD209), factory-specified for the Carrier PY3GNA030060AA HVAC system. The control transformer is the backbone of your unit's 24-volt low-voltage circuit — it steps down 208/240V line voltage to the 24V signal used by the thermostat, control board, gas valve, contactor coil, and every other low-voltage component. When it fails, the entire control circuit goes dark: the thermostat goes blank, the system stops responding to calls for heating or cooling, and no safeties or sequences can operate.

  • Specs: 208/240V primary input | 24V secondary output | 40VA power rating | 50/60 Hz | Compact footprint: 3.5" L × 2.2" W × 1.9" H | OEM part number HT01BD209
  • OEM vs Generic: This factory-authorized OEM transformer is wound to exact Carrier tolerances, ensuring a stable 24V rail under full load. Off-brand substitutes often drift under load, causing intermittent lockouts, nuisance tripping of safeties, or premature control board failure.
  • Install difficulty: 2/5 — Disconnect and lockout all power before beginning. Tools needed: multimeter (verify 0V at primary before touching wires), flathead and Phillips screwdrivers, wire nuts or spade terminals. Photograph all wiring connections before removal. Confirm primary voltage tap matches your supply voltage (208V or 240V) before energizing.
  • Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Direct OEM replacement for Carrier model PY3GNA030060AA. Also replaces superseded Carrier part numbers HT01BD207, HT01CN232, and 9076-00. Always verify your unit's supply voltage and confirm the part number on your existing transformer's label before ordering. Our fitment team is available to verify compatibility before you buy — order with confidence.

Shipping Information

  • Orders placed before 3PM CST ship same business day
  • Standard delivery: 2-5 business days
  • Express shipping available at checkout
  • Free shipping on orders over $99
  • Tracking number emailed upon shipment

Return Policy

  • 30-day returns on unused parts in original packaging
  • Electrical parts (capacitors, contactors, control boards) are final sale once installed
  • Email info@nationalhvacparts.com to initiate a return
  • Refunds processed within 5-7 business days

Frequently Asked Questions

Does this Transformer fit my Carrier PY3GNA030060AA?
Yes. This is the factory-specified OEM transformer for the Carrier PY3GNA030060AA. It is a direct drop-in replacement that fits without modification. Always verify the model number on your equipment nameplate before ordering.
How do I replace the transformer on my Carrier PY3GNA030060AA?
Difficulty: Medium (30–45 min)
Step 1: Turn off breaker. Step 2: Photo wiring connections. Step 3: Disconnect wires from old transformer. Step 4: Remove mounting hardware. Step 5: Install new transformer, reconnect wires matching voltage ratings. Step 6: Verify 24V output with multimeter.
My thermostat has no power. What failed?
Thermostat with no display = failed 24V transformer (or blown control board fuse). Check the 3A/5A fuse on the control board first ($1–$5 fix). If fuse is good but no 24V output from transformer, replace transformer.
Is this transformer compatible with Bryant or Payne too?
Many Carrier parts are cross-compatible with Bryant and Payne since all three brands are manufactured by Carrier Global Corporation. The same physical part is often used across brand labels with different model numbers. To verify: check your Bryant or Payne equipment service manual for cross-compatible part numbers, or email info@nationalhvacparts.com with your model number.
Should I use OEM or aftermarket for my Carrier transformer?
OEM recommended for reliability and warranty compatibility. OEM parts match exact factory specifications for proper fit, performance, and safety. While aftermarket alternatives cost less upfront, the risk of improper fit and reduced lifespan usually makes OEM the better value long-term.
How fast does National HVAC Parts ship?
Orders placed before 3:00 PM CST ship the same business day. Standard delivery is 2–5 business days anywhere in the continental United States. Express shipping available at checkout. We ship from Houston, TX to all 50 states. 30-day return policy on all parts.
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Mike Rivera
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