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OEM Carrier Transformer 40VA 208/240V–24V for PY3GNAA30060NA
Carrier

OEM Carrier Transformer 40VA 208/240V–24V for PY3GNAA30060NA

SKU: CARRIE-PY3GNAA30060NA-TRANSFORMER-HT01BD209 Brand: Carrier
✓ Guaranteed to fit PY3GNAA30060NA — or your money back. Terms

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Texas CMBL #19328542014
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OEM Carrier Control Transformer 40VA 208/240V to 24V for Model PY3GNAA30060NA

This OEM Carrier transformer (part #HT01BD209) is the factory-specified replacement for the Carrier PY3GNAA30060NA packaged unit. The transformer steps down line voltage from 208/240V to the 24V control circuit that powers your thermostat, contactor coils, and control board. When this transformer fails, the entire low-voltage control system goes dead — no thermostat response, no contactor pull-in, and no call for heating or cooling. If your system is completely unresponsive despite a live line-voltage supply, a failed transformer is one of the first components to check.

  • Specs: 208/240V primary input | 24V secondary output | 40VA power rating | 50/60 Hz | Factory OEM part #HT01BD209
  • OEM vs Generic: OEM transformers are wound and insulated to Carrier's exact VA and voltage tolerance specifications. Generic units may run marginally out of spec under load, causing intermittent lockouts or premature control board failure.
  • Install difficulty: 2/5 — Shut off all power to the unit before beginning. Tools needed: multimeter (to confirm 0V before touching wires), flat-head and Phillips screwdrivers, wire nuts or spade terminals. Photograph existing wiring before disconnecting. Confirm correct VA rating matches your control circuit load.
  • Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier PY3GNAA30060NA packaged unit. Also fits a broad range of Carrier, Bryant, and Payne systems requiring a 208/240V-to-24V 40VA control transformer — always verify against your unit's data plate before ordering. Not sure it fits? Our HVAC parts specialists confirm fitment before you buy — 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 PY3GNAA30060NA?
Yes. This is the factory-specified OEM transformer for the Carrier PY3GNAA30060NA. 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 PY3GNAA30060NA?
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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