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OEM Carrier Control Transformer 40VA 208/230V for PY3GNA048115NB
Carrier

OEM Carrier Control Transformer 40VA 208/230V for PY3GNA048115NB

SKU: CARRIE-PY3GNA048115NB-TRANSFORMER-HT01BD209 Brand: Carrier
✓ Guaranteed to fit PY3GNA048115NB — or your money back. Terms

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Texas CMBL #19328542014
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Govt POs Accepted

OEM Carrier Control Transformer 40VA 208/230V–24V for Model PY3GNA048115NB

This is the genuine OEM Carrier control transformer (part number HT01BD209), factory-specified for the Carrier PY3GNA048115NB packaged unit. The control transformer steps high-voltage line power (208/230V primary) down to the 24V secondary signal that energizes your control board, thermostat, contactor coils, and relay circuits. When this transformer fails, the entire low-voltage control circuit goes dead — nothing operates, no thermostat response, no fan, no heat or cooling. A failed transformer is often misdiagnosed as a bad control board, making correct identification and prompt replacement critical.

  • Specs: 208/230V primary input | 24V secondary output | 40VA power rating | 50/60 Hz | Replaces HT01BD207, HT01CN232, 9076-00
  • OEM vs Generic: This factory-authorized OEM transformer is wound to exact Carrier tolerances. Generic aftermarket units frequently under-deliver on VA capacity, causing nuisance tripping of the control circuit fuse and shortening the life of downstream low-voltage components.
  • Install difficulty: 2/5 — Shut off all power at the breaker and disconnect switch before starting. Tools needed: flathead and Phillips screwdrivers, wire strippers, multimeter. Photograph all existing wiring before disconnecting. Verify primary and secondary voltages with a multimeter after installation before closing the cabinet.
  • Warranty: 1-year OEM factory warranty against manufacturing defects. In stock and ships same business day from our warehouse.

Compatibility: Engineered as the factory-fit replacement for the Carrier PY3GNA048115NB packaged unit. Verify your unit's data plate voltage against the 208/230V primary requirement before ordering. Our team is available to confirm fitment — order with confidence and get your system back online today.

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 PY3GNA048115NB?
Yes. This is the factory-specified OEM transformer for the Carrier PY3GNA048115NB. 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 PY3GNA048115NB?
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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