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OEM Carrier Transformer 40VA 208/240V–24V for PY3GNA030060NA
Carrier

OEM Carrier Transformer 40VA 208/240V–24V for PY3GNA030060NA

SKU: CARRIE-PY3GNA030060NA-TRANSFORMER-HT01BD209 Brand: Carrier
✓ Guaranteed to fit PY3GNA030060NA — or your money back. Terms

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Texas CMBL #19328542014
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OEM Carrier 40VA Control Transformer HT01BD209 for Model PY3GNA030060NA

This OEM Carrier control transformer (part #HT01BD209) is the factory-specified replacement for the Carrier PY3GNA030060NA HVAC system. The transformer steps down line voltage from 208/240V to the 24V signal required to power your thermostat, control board, and all low-voltage components. When this part fails, the entire control circuit goes dead — the thermostat loses power, no calls for heating or cooling are processed, and the system will not respond. If your system is completely unresponsive despite 240V line power being present, a failed transformer is a primary suspect.

  • Specs: 208/240V primary input | 24V secondary output | 40VA power rating | 50/60 Hz | OEM part number HT01BD209 | Direct factory replacement
  • OEM vs Generic: The OEM HT01BD209 is wound to exact Carrier factory tolerances, ensuring stable 24V output under full load. Generic transformers can sag under load voltage, causing intermittent lockouts, nuisance tripping of limit switches, or erratic thermostat behavior.
  • Install difficulty: 2/5 — Shut off all power at the breaker and verify with a multimeter before touching any wiring. Tools needed: flathead and Phillips screwdrivers, wire nuts or spade connectors, multimeter. Note and photograph all wiring connections prior to removal. Always confirm 24V output after installation before closing the unit.
  • Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed as a direct OEM replacement for Carrier model PY3GNA030060NA. Verify your existing transformer's primary voltage, secondary voltage, and VA rating against the data plate on your unit before ordering. Not sure it fits? Our HVAC parts specialists confirm fitment before you buy — contact us today and get your system back online fast.

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 PY3GNA030060NA?
Yes. This is the factory-specified OEM transformer for the Carrier PY3GNA030060NA. 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 PY3GNA030060NA?
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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