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OEM Carrier Control Transformer 40VA 208/230V–24V for PY3GNA048130NB
Carrier

OEM Carrier Control Transformer 40VA 208/230V–24V for PY3GNA048130NB

SKU: CARRIE-PY3GNA048130NB-TRANSFORMER-HT01BD209 Brand: Carrier
✓ Guaranteed to fit PY3GNA048130NB — or your money back. Terms

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Texas CMBL #19328542014
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OEM Carrier Control Transformer 40VA 208/230V–24V for Model PY3GNA048130NB

This is the genuine OEM control transformer for the Carrier PY3GNA048130NB packaged HVAC unit. The transformer steps down 208/230V line voltage to the 24V signal required by your thermostat, contactor coil, gas valve, and control board. When it fails, the entire low-voltage control circuit goes dark — symptoms include a completely unresponsive thermostat, a system that won't call for heating or cooling, or a tripped secondary fuse with no obvious short elsewhere in the circuit.

  • Specs: 40VA capacity | 208/230V primary | 24V secondary | 50/60 Hz | OEM part number HT01BD209 | Replaces superseded part numbers HT01BD207, HT01CN232, and 9076-00
  • OEM vs Generic: The OEM transformer is wound and potted to Carrier's exact VA rating and insulation class. Generic aftermarket transformers frequently run undersized VA ratings, causing thermal overload under full control-circuit load and nuisance fuse trips.
  • Install Difficulty: 2/5 — Shut off power at the disconnect and verify zero voltage before touching any wiring. Tools needed: flathead and Phillips screwdrivers, multimeter, needle-nose pliers. Label or photograph all wiring connections (R, C, and line-side terminals) before removal. Confirm secondary output reads ~24–28V AC after installation.
  • Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Factory-matched replacement for Carrier model PY3GNA048130NB. Also a direct replacement for other Carrier, Bryant, and Payne units originally equipped with HT01BD207 or HT01CN232 transformers — always confirm your unit's voltage requirements on the data plate before ordering. Our fitment team is available to verify compatibility before you buy.

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 PY3GNA048130NB?
Yes. This is the factory-specified OEM transformer for the Carrier PY3GNA048130NB. 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 PY3GNA048130NB?
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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