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OEM Payne Transformer 40VA 120V/24V for PA3GNAA24000AA
Payne

OEM Payne Transformer 40VA 120V/24V for PA3GNAA24000AA

SKU: PAYNE-PA3GNAA24000AA-TRANSFORMER-HT01BD209 Brand: Payne

Order before 3PM CST — ships same day.
Standard delivery 2-5 business days. Express options at checkout.

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OEM Payne Control Transformer 40VA for Model PA3GNAA24000AA

This OEM replacement transformer (part number HT01BD209) is the factory-specified control circuit transformer for the Payne PA3GNAA24000AA air conditioner. The transformer steps line voltage (120V) down to 24V to power the control board, thermostat, contactor coil, and all low-voltage safety circuits. When the transformer fails, absolutely nothing in the system responds — the thermostat goes blank, the unit won't call for cooling or heating, and there is zero control circuit activity. It is often the first component to check when a system appears completely dead with no fault codes.

  • Specs: 40VA rating | 120V primary / 24V secondary | OEM part number HT01BD209 | Factory-matched output for stable low-voltage control circuit operation
  • OEM vs Generic: This is the genuine factory OEM transformer, ensuring exact VA rating, terminal configuration, and mounting dimensions. Generic transformers may run undersized VA ratings, causing voltage sag that leads to nuisance lockouts, contactor chatter, and premature control board failure.
  • Install difficulty: 2/5 — Always disconnect power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to confirm 24V output after install). Label or photograph all low-voltage wiring before disconnecting. Most installs complete in under 30 minutes.
  • Warranty: 1-year OEM factory warranty against defects. Orders placed before cutoff ship same business day from our climate-controlled warehouse.

Compatibility: Designed specifically for the Payne PA3GNAA24000AA split-system air conditioner. Always verify your existing transformer's VA rating and primary/secondary voltages on the data plate or wiring diagram before ordering. Our HVAC parts team is available to confirm fitment — reach out before you order if you have any questions.

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 $75
  • 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 support@nationalhvacparts.com to initiate a return
  • Refunds processed within 5-7 business days

Frequently Asked Questions

Does this Transformer fit my Payne PA3GNAA24000AA?
Yes. This is the factory-specified OEM transformer for the Payne PA3GNAA24000AA. 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 Payne PA3GNAA24000AA?
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 Payne 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 Payne 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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