Same-day shipping before 3PM CST · 35,000+ OEM Parts · Texas CMBL & SAM.gov Registered · Government POs Accepted

Menu

Home Shop All Account Cart
OEM Carrier Control Transformer 40VA 208/240V–24V — PY3PNA048130NB
Carrier

OEM Carrier Control Transformer 40VA 208/240V–24V — PY3PNA048130NB

SKU: CARRIE-PY3PNA048130NB-TRANSFORMER-HT01BD209 Brand: Carrier
✓ Guaranteed to fit PY3PNA048130NB — or your money back. Terms

OEM Guaranteed

Same-Day Ship

30-Day Returns

Secure Checkout

Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

OEM Carrier Control Transformer 40VA 208/240V to 24V for Model PY3PNA048130NB

This genuine OEM Carrier control transformer (part# HT01BD209) is the factory-specified replacement for the Carrier PY3PNA048130NB packaged unit. The transformer steps down 208/240V line voltage to the 24V low-voltage signal that powers every critical control circuit in your system — including the thermostat, contactor coil, control board, and safety switches. When it fails, nothing works: the thermostat goes dark, the system refuses to respond to any call, and the blower and compressor will not energize. A failed transformer is often misdiagnosed as a thermostat or control board fault, making correct identification and prompt replacement essential.

  • Specs: 40VA | Primary: 208/240V | Secondary: 24V | 50/60Hz | Class 2 control transformer | Factory-matched for Carrier PY3PNA048130NB
  • OEM vs Generic: OEM transformers are wound to exact VA and voltage tolerances for your unit. Generic units can run hot under full control load, tripping thermal protection and causing intermittent lockouts — always choose OEM for transformers.
  • Install difficulty: 2/5 — Shut off power at the disconnect before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Always verify 24VAC output after installation before buttoning up the panel.
  • Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse.

Compatibility: Direct OEM replacement for Carrier model PY3PNA048130NB. Also replaces legacy Carrier part numbers HT01BD207, HT01CN232, and 9076-00. Verify your existing transformer's primary voltage and VA rating on the data plate before ordering. Our fitment team is available to confirm compatibility prior to purchase.

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 OEM Carrier Control Transformer 40VA 208/240V–24V — PY3PNA048130NB?
Yes. This is the factory-specified OEM transformer for the Carrier OEM Carrier Control Transformer 40VA 208/240V–24V — PY3PNA048130NB. 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 OEM Carrier Control Transformer 40VA 208/240V–24V — PY3PNA048130NB?
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.
Home Shop Search Account Cart
Fitment Guaranteed
MR
Mike Rivera
HVAC Parts Specialist — Online