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OEM Carrier Control Transformer 40VA 208/240V–24V for PY3GPAA42060NA
Carrier

OEM Carrier Control Transformer 40VA 208/240V–24V for PY3GPAA42060NA

SKU: CARRIE-PY3GPAA42060NA-TRANSFORMER-HT01BD209 Brand: Carrier
✓ Guaranteed to fit PY3GPAA42060NA — 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 PY3GPAA42060NA

This OEM Carrier control transformer (part number HT01BD209) is the factory-specified replacement for the Carrier PY3GPAA42060NA packaged unit. The transformer steps down line voltage (208/240V) to the 24V low-voltage signal required by the thermostat, control board, contactor coil, and all other 24V control circuit components. When this part fails, the entire control circuit goes dead — no thermostat response, no contactor pull-in, and no system operation. A failed transformer is often misdiagnosed as a control board issue, making correct identification critical before ordering other components.

  • Specs: 208/240V Primary | 24V Secondary | 40VA | 50/60Hz | OEM Part# HT01BD209 | Also supersedes HT01BD207, HT01CN232, 9076-00
  • OEM vs Generic: This is a genuine Carrier OEM transformer wound to exact VA and voltage tolerances. Undersized or off-tolerance aftermarket units can cause erratic cycling, nuisance tripping, or premature control board failure due to voltage sag under load.
  • Install difficulty: 2/5 — Shut off all power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter (to verify 24V output after install). Label all wires before disconnecting. Typical job time: 20–30 minutes.
  • 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 PY3GPAA42060NA packaged HVAC equipment. Verify your unit's data plate lists a 208/240V primary and 24V secondary control circuit before ordering. Our fitment team is available to confirm compatibility before you buy — order with confidence and get your system running 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 PY3GPAA42060NA?
Yes. This is the factory-specified OEM transformer for the Carrier PY3GPAA42060NA. 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 PY3GPAA42060NA?
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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