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OEM Carrier Control Transformer 40VA 208/240V–24V for PY3GNA024060AA
Carrier

OEM Carrier Control Transformer 40VA 208/240V–24V for PY3GNA024060AA

SKU: CARRIE-PY3GNA024060AA-TRANSFORMER-HT01BD209 Brand: Carrier
✓ Guaranteed to fit PY3GNA024060AA — 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 PY3GNA024060AA

This OEM Carrier control transformer (part number HT01BD209) is the factory-specified replacement for the Carrier PY3GNA024060AA HVAC system. Its sole job is to step down the 208/240V line voltage to the safe 24V signal that powers your thermostat, control board, and every low-voltage component in the system. When this transformer fails — due to electrical surges, short circuits in control wiring, or simple wear — the entire system goes dark: the thermostat loses power, the unit refuses to respond to calls for heating or cooling, and you may hear a faint buzzing or humming from the transformer housing itself.

  • Specs: 208/240V primary | 24V secondary | 40VA rating | 50/60 Hz | Direct OEM replacement for Carrier PY3GNA024060AA
  • Also Replaces: HT01BD207, HT01CN232, 9076-00 — this part supersedes all earlier Carrier control transformer revisions listed above.
  • OEM vs Generic: OEM transformers are wound and insulated to exact factory tolerances, ensuring a full 24V output under load. Undersized or off-spec generic units can sag below 24V, causing nuisance lockouts, erratic control board behavior, and premature component failure.
  • Install Difficulty: 2/5 — Shut off all power at the disconnect and breaker before touching any wiring. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Photograph all wire connections before disconnecting. Verify 24V output with a multimeter after installation before closing the panel.
  • Warranty: 1-year OEM factory warranty against manufacturing defects. Ships same business day from our warehouse when ordered before cutoff.

Compatibility: Designed for the Carrier PY3GNA024060AA. Verify your unit's data plate shows a 208/240V primary control circuit before ordering. If you are unsure whether this part fits your specific serial number or configuration, contact our team — we verify fitment before you buy. Order now and get same-day shipping on all in-stock OEM Carrier 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 PY3GNA024060AA?
Yes. This is the factory-specified OEM transformer for the Carrier PY3GNA024060AA. 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 PY3GNA024060AA?
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
HVAC Parts Specialist — Online