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OEM Payne Transformer 40VA 120V/24V for PA3PNA018000AA
Payne

OEM Payne Transformer 40VA 120V/24V for PA3PNA018000AA

SKU: PAYNE-PA3PNA018000AA-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 40VA Control Transformer for Model PA3PNA018000AA

This OEM replacement transformer (part# HT01BD209) is the factory-specified control circuit transformer for the Payne PA3PNA018000AA air handler or packaged unit. The transformer steps down line voltage (120V) to 24V AC to power the entire low-voltage control circuit — including the thermostat, contactor coil, and control board. When this component fails, the system goes completely silent: no thermostat response, no blower activation, and no error codes — because the brain of the system has lost its power source.

  • Specs: 40VA rating | Primary: 120V AC | Secondary: 24V AC | OEM part number HT01BD209 | Factory-matched output tolerance for reliable control circuit operation
  • OEM vs Generic: OEM transformers are wound to exact VA and voltage specifications for the Payne PA3PNA018000AA. Generic units may deliver inconsistent secondary voltage, causing nuisance lockouts, contactor chatter, or premature control board failure.
  • Install difficulty: 2/5 — Disconnect power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter (to verify 24V output post-install), wire nuts or spade connectors. Note wire colors and terminal positions before removal. Always confirm input voltage is de-energized before handling.
  • Warranty: 1-year OEM factory warranty against defects. In-stock and ships same business day from our warehouse.

Compatibility: Designed as a direct OEM replacement for the Payne PA3PNA018000AA. Verify your unit's control circuit voltage requirements on the data plate before ordering — confirm 120V primary and 24V/40VA secondary. Our parts specialists are available to verify fitment before you purchase. Order now and receive same-day shipping on all in-stock components.

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 PA3PNA018000AA?
Yes. This is the factory-specified OEM transformer for the Payne PA3PNA018000AA. 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 PA3PNA018000AA?
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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