Same-day shipping on orders before 3PM CST · 15,000+ OEM Parts In Stock · Carrier · Bryant · ICP · Heil · Tempstar
Track Order | 1-800-NHP-HVAC | Trade Accounts

Menu

Home Shop All Account Cart
Home / OEM Payne Transformer 40VA 120V/24V f...
OEM Payne Transformer 40VA 120V/24V for PA3ZNB036000AC
Payne

OEM Payne Transformer 40VA 120V/24V for PA3ZNB036000AC

SKU: PAYNE-PA3ZNB036000AC-TRANSFORMER-HT01BD209 Brand: Payne

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

OEM Guaranteed

Same-Day Ship

30-Day Returns

Secure Checkout

OEM Payne 40VA Control Transformer for Model PA3ZNB036000AC

This is the genuine OEM replacement transformer (part# HT01BD209) for the Payne PA3ZNB036000AC split-system air conditioner. The transformer steps down 120V line voltage to the 24V AC signal that powers your thermostat, contactor coil, and all low-voltage control circuits. When this component fails, the entire control system goes dark — your thermostat loses power, the contactor will not energize, and the unit will not respond to any call for cooling. If your system is completely unresponsive despite confirmed power at the disconnect, a failed transformer is one of the first components to test.

  • Specs: 40VA rating | Primary: 120V AC | Secondary: 24V AC | Factory-matched winding tolerance | Compact mount design for direct OEM fitment
  • OEM vs Generic: The OEM HT01BD209 transformer is wound and insulated to Payne's exact factory specifications. Generic transformers often carry lower VA headroom and inferior insulation ratings, which can cause premature failure — especially when multiple accessories (humidifiers, zoning boards) load the 24V circuit.
  • Install difficulty: 2/5 — Shut off power at the breaker and disconnect before proceeding. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Note wire colors and terminal positions before disconnecting old unit. Confirm 24V output with a multimeter after installation before closing the panel.
  • Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Engineered as a direct OEM replacement for the Payne PA3ZNB036000AC 3-ton split-system air conditioner. Always verify your existing transformer's VA rating and primary/secondary voltages on the data plate or wiring diagram inside your unit before ordering. Our parts specialists are available to confirm fitment — just reach out before you buy.

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 PA3ZNB036000AC?
Yes. This is the factory-specified OEM transformer for the Payne PA3ZNB036000AC. 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 PA3ZNB036000AC?
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.
Home Shop Search Account Cart