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OEM Carrier Control Transformer 40VA 208/240V–24V for PY3GPAA42060AA
Carrier

OEM Carrier Control Transformer 40VA 208/240V–24V for PY3GPAA42060AA

SKU: CARRIE-PY3GPAA42060AA-TRANSFORMER-HT01BD209 Brand: Carrier
✓ Guaranteed to fit PY3GPAA42060AA — 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 — Model PY3GPAA42060AA (HT01BD209)

This genuine OEM control transformer is the factory-specified replacement for the Carrier PY3GPAA42060AA packaged unit. The transformer steps down 208/240V line voltage to the 24V signal that powers your thermostat, contactor coil, control board, and every low-voltage safety circuit in the system. When it fails, the result is total control loss — the thermostat goes dark, the system won't respond to any call for heating or cooling, and no safety or diagnostic circuits can operate.

  • Specs: 40VA capacity | Primary: 208/240V | Secondary: 24V | 50/60Hz rated | OEM Part # HT01BD209 | Replaces HT01BD207, HT01CN232, 9076-00
  • OEM vs Generic: The OEM transformer is wound and rated to exact Carrier factory specifications. Generic alternatives may run outside tolerance, causing nuisance tripping of the 3A control fuse or premature failure under high-demand multi-stage systems.
  • Install difficulty: 2/5 — Disconnect all power before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Label all low-voltage wires before removal and verify 24V output with a multimeter before closing the unit up.
  • Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse.

Compatibility: Designed as the direct OEM replacement for the Carrier PY3GPAA42060AA packaged unit. Verify primary voltage on your unit's data plate (208V or 240V) before ordering — this transformer supports both. Cross-references: HT01BD207, HT01CN232, 4000A46E07AE28, 9076-00. Questions about fitment? Our HVAC parts specialists verify compatibility before you order — same-day shipping on all in-stock parts.

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 PY3GPAA42060AA?
Yes. This is the factory-specified OEM transformer for the Carrier PY3GPAA42060AA. 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 PY3GPAA42060AA?
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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