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OEM Carrier Control Transformer 40VA 208/240V–24V for PY3PNA024060NA
Carrier

OEM Carrier Control Transformer 40VA 208/240V–24V for PY3PNA024060NA

SKU: CARRIE-PY3PNA024060NA-TRANSFORMER-HT01BD209 Brand: Carrier
✓ Guaranteed to fit PY3PNA024060NA — or your money back. Terms

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Texas CMBL #19328542014
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OEM Carrier 40VA Control Transformer 208/240V to 24V — HT01BD209 for Model PY3PNA024060NA

This OEM Carrier control transformer (part #HT01BD209) is the factory-specified replacement for the Carrier PY3PNA024060NA and a broad range of Carrier, Bryant, and Payne HVAC systems. The transformer steps down line voltage from 208/240V to the 24V AC signal that powers your thermostat, control board, gas valve, and all low-voltage safety circuits. When this component fails, the entire control circuit loses power — the result is a system that won't respond at all: no heating, no cooling, no fan, and no thermostat communication. A failed transformer is one of the first things to check when a system goes completely unresponsive.

  • Specs: Input Voltage: 208/240V | Output Voltage: 24V | Power Rating: 40VA | Frequency: 50/60 Hz | OEM Part #: HT01BD209 | Also replaces HT01CN232
  • OEM vs Generic: This is the genuine Carrier OEM transformer, wound and tested to exact factory specifications. Generic aftermarket transformers can introduce voltage instability that causes nuisance lockouts, control board damage, and premature component failure across the entire low-voltage circuit.
  • Install Difficulty: 2/5 — Always shut off power at the breaker and disconnect the disconnect before servicing. Tools needed: flathead and Phillips screwdrivers, multimeter (verify 0V before touching wires), wire nuts or spade connectors. Photograph all wiring connections before removal. Match wire colors carefully on reinstall.
  • Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier PY3PNA024060NA and compatible with numerous Carrier, Bryant, and Payne residential and light-commercial heating and cooling systems requiring a 208/240V primary, 24V secondary, 40VA control transformer. Always verify the voltage and VA rating on your unit's data plate before ordering. Need help confirming fitment? Our HVAC parts specialists verify compatibility before you buy — contact us today and get your system back online fast.

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 PY3PNA024060NA?
Yes. This is the factory-specified OEM transformer for the Carrier PY3PNA024060NA. 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 PY3PNA024060NA?
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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