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OEM Carrier Transformer 40VA 120V/24V for PY3GNA030060AB
Carrier

OEM Carrier Transformer 40VA 120V/24V for PY3GNA030060AB

SKU: CARRIE-PY3GNA030060AB-TRANSFORMER-HT01BD209 Brand: Carrier
✓ Guaranteed to fit PY3GNA030060AB — or your money back. Terms

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Texas CMBL #19328542014
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Govt POs Accepted

OEM Carrier Transformer HT01BD209 40VA 120V/24V for Model PY3GNA030060AB

This OEM control-circuit transformer is the factory-specified replacement for the Carrier PY3GNA030060AB. Its sole but critical job is to step down 120V line voltage to the 24V signal voltage that powers your thermostat, control board relays, and every other low-voltage component in the system. When this transformer fails, the entire control circuit goes dark — no thermostat response, no ignition sequence, no fan operation. If your system is completely unresponsive and you've already confirmed power at the unit, a failed transformer is the first thing to test.

  • Specs: 40VA rating | Primary: 120V AC | Secondary: 24V AC | OEM part number HT01BD209 | Factory-matched for Carrier PY3GNA030060AB
  • OEM vs Generic: This is a genuine OEM Carrier transformer, wound and rated to exact factory specifications. Generic transformers often use undersized cores that run hot under full VA load, shortening service life and risking nuisance trips on your overcurrent protection.
  • Install difficulty: 2/5 — Always shut off power at the disconnect and confirm voltage is absent with a multimeter before touching any wiring. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter, wire nuts or spade connectors. Photograph existing wiring before disconnecting. Primary and secondary leads must go to the correct terminals — reversing them will damage downstream components.
  • Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse when ordered before 3 PM local time.

Compatibility: Engineered specifically for the Carrier PY3GNA030060AB. Confirm the 40VA, 120V primary / 24V secondary specification on your unit's data plate before ordering. Not sure if this part fits your unit? Our HVAC parts specialists verify fitment before you order — contact us and we'll confirm within minutes.

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 PY3GNA030060AB?
Yes. This is the factory-specified OEM transformer for the Carrier PY3GNA030060AB. 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 PY3GNA030060AB?
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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