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OEM Payne Transformer 40VA 120V/24V for PA3ZNA024000AA
Payne

OEM Payne Transformer 40VA 120V/24V for PA3ZNA024000AA

SKU: PAYNE-PA3ZNA024000AA-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 PA3ZNA024000AA

This is the OEM factory-specified control transformer (part# HT01BD209) for the Payne PA3ZNA024000AA air conditioner. The transformer steps down 120V line voltage to the 24V signal that powers your thermostat, contactor coil, and control board. When it fails, the entire control circuit goes dark — your thermostat loses power, the system won't respond to any calls for cooling or heating, and you may find a blown 3A fuse nearby as the first clue. Replacing the transformer with the correct OEM unit restores factory-spec voltage regulation and protects downstream components.

  • Specs: 40VA rated | 120V primary / 24V secondary | Factory-matched output tolerance | OEM part number HT01BD209
  • OEM vs Generic: OEM transformers are wound to exact VA and voltage tolerances required by Payne's control circuitry. Undersized or off-spec generic units can cause nuisance tripping, control board damage, or contactor chatter — making the OEM choice the only reliable long-term fix.
  • Install difficulty: 2/5 — Always shut off power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, wire stripper, multimeter. Photograph all wiring connections before disconnecting. Check and replace any blown inline fuse before restoring power.
  • Warranty: 1-year OEM factory warranty against defects. In stock and ships same business day from our warehouse.

Compatibility: Designed specifically for the Payne PA3ZNA024000AA split-system unit. Verify primary voltage (120V) and VA rating on your unit's data plate before ordering. If you're unsure of fitment, our HVAC parts specialists are available to confirm compatibility before you buy — same-day shipping available on all in-stock orders.

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 PA3ZNA024000AA?
Yes. This is the factory-specified OEM transformer for the Payne PA3ZNA024000AA. 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 PA3ZNA024000AA?
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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