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OEM Carrier Control Transformer 40VA 208/240V–24V for PY3PNA036060NA
Carrier

OEM Carrier Control Transformer 40VA 208/240V–24V for PY3PNA036060NA

SKU: CARRIE-PY3PNA036060NA-TRANSFORMER-HT01BD209 Brand: Carrier
✓ Guaranteed to fit PY3PNA036060NA — 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 — HT01BD209 for Model PY3PNA036060NA

The Carrier HT01BD209 is the factory-specified OEM control transformer for the PY3PNA036060NA packaged unit. This transformer steps down 208/240V line voltage to the 24V signal required by your thermostat, control board, contactor coils, and all low-voltage safety circuits. When this transformer fails, the entire control circuit goes dark — the thermostat becomes unresponsive, the system won't call for heating or cooling, and no fault codes will display. Replacing it with the correct OEM part restores full system communication and operation.

  • Specs: 40VA rating | 208/240V primary | 24V secondary | 50/60 Hz | Class 2 control transformer | Replaces HT01BD207, HT01CN232, and 9076-00
  • OEM vs Generic: OEM transformers are wound to exact VA and impedance specs, protecting downstream boards and contactors from voltage sag or surge. Generic units with loose VA tolerances can cause nuisance tripping, erratic thermostat behavior, or premature control board failure.
  • Install difficulty: 2/5 — Shut off all power at the disconnect and breaker before working on low-voltage wiring. Tools needed: flathead and Phillips screwdrivers, multimeter, wire stripper, needle-nose pliers. Always label all 24V wires before disconnecting. Confirm 0V at transformer terminals before touching leads.
  • Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse when ordered before cutoff.

Compatibility: Factory-matched replacement for Carrier model PY3PNA036060NA packaged units. Verify your unit's data plate shows 208/240V primary and 24V secondary before ordering. Cross-references: HT01BD207, HT01CN232, 9076-00, 4000A46E07AE28. Not sure it fits? Our fitment team verifies compatibility before you buy — contact us before placing your order.

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 PY3PNA036060NA?
Yes. This is the factory-specified OEM transformer for the Carrier PY3PNA036060NA. 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 PY3PNA036060NA?
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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