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OEM Payne Transformer 40VA 120V/24V for PA3ZPA030000AA
Payne

OEM Payne Transformer 40VA 120V/24V for PA3ZPA030000AA

SKU: PAYNE-PA3ZPA030000AA-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 PA3ZPA030000AA

This OEM replacement transformer (part# HT01BD209) is the factory-specified step-down transformer for the Payne PA3ZPA030000AA packaged unit. The transformer converts 120V line voltage to the 24V signal used by your thermostat, contactor coil, gas valve, and control board. When this component fails, the entire low-voltage control circuit goes dark — the thermostat goes blank, the system stops responding to calls for heating or cooling, and no components energize. It is often the first part to check when a system appears completely dead despite having line voltage present.

  • Specs: 40VA rating | 120V primary / 24V secondary | Hardwired lead connections | Factory-matched output tolerance for stable low-voltage control circuits
  • OEM vs Generic: This OEM HT01BD209 transformer is wound to Payne's exact VA and voltage specifications. Generic substitutes frequently deliver unstable 24V output, causing nuisance lockouts, contactor chatter, and premature control board failure.
  • Install difficulty: 2/5 — Disconnect power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, wire strippers, needle-nose pliers, multimeter. Verify 24V output after installation before closing the cabinet.
  • Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Engineered specifically for the Payne PA3ZPA030000AA packaged unit. Always verify your existing transformer's VA rating and primary/secondary voltages on the unit's data plate before ordering. Have questions about fitment? Our HVAC parts specialists confirm compatibility before you buy — call or chat today.

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 PA3ZPA030000AA?
Yes. This is the factory-specified OEM transformer for the Payne PA3ZPA030000AA. 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 PA3ZPA030000AA?
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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