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 Transformer 40VA 208/240V–24V for PY3GNA042060AB
Carrier

OEM Carrier Transformer 40VA 208/240V–24V for PY3GNA042060AB

SKU: CARRIE-PY3GNA042060AB-TRANSFORMER-HT01BD209 Brand: Carrier
✓ Guaranteed to fit PY3GNA042060AB — 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–24V (HT01BD209) for Model PY3GNA042060AB

This is the factory-specified OEM control transformer for the Carrier PY3GNA042060AB packaged unit. The transformer steps down line voltage (208/240V) to the 24V signal that powers your thermostat, control board, and every relay in the system. When it fails, the entire control circuit goes dead — the thermostat goes blank, nothing responds, and the unit won't start at all. A failed transformer is often misdiagnosed as a blown control board, making correct identification of this part critical before replacing more expensive components.

  • Specs: Input 208/240V | Output 24V | 40VA power rating | 50/60Hz | OEM part number HT01BD209 | Factory-matched dimensions and wiring terminals
  • OEM vs Generic: OEM transformers are wound to exact VA tolerances, protecting downstream components from voltage sag under full control-circuit load. Generic units often run underrated, leading to premature failure of contactors and control boards.
  • 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, multimeter, needle-nose pliers. Label all wires before disconnecting, and 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: Engineered as the direct OEM replacement for Carrier model PY3GNA042060AB. Verify your unit's data plate shows a 208/240V primary and 24V secondary control circuit before ordering. Not sure about fitment? Our HVAC parts specialists verify compatibility before you buy — order with confidence or contact us 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 PY3GNA042060AB?
Yes. This is the factory-specified OEM transformer for the Carrier PY3GNA042060AB. 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 PY3GNA042060AB?
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