What are the specs for this Transformer?

The correct replacement for Carrier model PY2PNB024040NC is this exact part. It is the factory-specified replacement with exact OEM specifications. Using a part with different specifications can cause equipment damage or void your warranty. You can verify this by checking the data plate on your Carrier equipment which lists the model number PY2PNB024040NC.

Is this transformer compatible with Bryant or Payne systems too?

Many Carrier parts are cross-compatible with Bryant and Payne systems since all three brands are manufactured by Carrier Global Corporation. The same physical part is often used across multiple brand labels with different model numbers. To verify cross-compatibility, check your Bryant or Payne equipment service manual for cross-compatible part numbers, or contact info@nationalhvacparts.com with your model number for confirmation.

Carrier

OEM Carrier Transformer 40VA 208/240V–24V for PY2PNB024040NC

Name: OEM Carrier Transformer 40VA 208/240V–24V for PY2PNB024040NC
Brand: Carrier
SKU: CARRIE-PY2PNB024040NC-TRANSFORMER-HT01BD209
Price: 47.25 USD
Availability: InStock

SKU: CARRIE-PY2PNB024040NC-TRANSFORMER-HT01BD209 Brand: Carrier

✓ Guaranteed to fit PY2PNB024040NC — or your money back. Terms

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OEM Carrier Control Transformer 40VA 208/240V to 24V — Model PY2PNB024040NC

This OEM Carrier transformer (part #HT01BD209) is the factory-specified 40VA step-down transformer for the Carrier PY2PNB024040NC packaged unit. It converts 208/240V line voltage down to the 24V AC signal that powers your thermostat, control board, and all low-voltage safety circuits. When this transformer fails, the entire control circuit goes dead — your thermostat goes blank, the system won't respond to any commands, and no heating or cooling stage will activate. A blown transformer is also often the first sign of a downstream short in your low-voltage wiring.

Specs: 208/240V primary input | 24V secondary output | 40VA power rating | 50/60Hz | OEM part #HT01BD209 | Factory-matched electrical characteristics
OEM vs Generic: This is the genuine Carrier OEM transformer, wound to exact VA and voltage tolerances. Generic transformers frequently run hot under sustained load and can fail prematurely, taking control boards with them — an expensive mistake on a packaged unit.
Install difficulty: 2/5 — Shut off all power at the disconnect before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (verify 0V before touching terminals). Label all 24V secondary wires before disconnecting. Typical swap time is 20–30 minutes for an experienced technician.
Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier PY2PNB024040NC packaged unit. Always verify input 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 — reach out 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

OEM Carrier Transformer 40VA 208...

$47.25

Frequently Asked Questions

Does this Transformer fit my Carrier PY2PNB024040NC?

Yes. This is the factory-specified OEM transformer for the Carrier PY2PNB024040NC. 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 PY2PNB024040NC?

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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OEM Carrier Transformer 40VA 208/240V–24V for PY2PNB024040NC

OEM Carrier Control Transformer 40VA 208/240V to 24V — Model PY2PNB024040NC

Shipping Information

Return Policy

Frequently Asked Questions