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OEM Carrier Transformer 40VA 208/240V–24V for PY3PNA036060AB
Carrier

OEM Carrier Transformer 40VA 208/240V–24V for PY3PNA036060AB

SKU: CARRIE-PY3PNA036060AB-TRANSFORMER-HT01BD209 Brand: Carrier
✓ Guaranteed to fit PY3PNA036060AB — or your money back. Terms

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Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

OEM Carrier 40VA Control Transformer HT01BD209 for Model PY3PNA036060AB

This OEM Carrier transformer (part #HT01BD209) is the factory-specified replacement for the Carrier PY3PNA036060AB HVAC system. The transformer steps down line voltage from 208/240V to the 24V signal required by your thermostat, control board, and all low-voltage control circuit components. When this transformer fails, the entire control circuit goes dark — you'll see a completely unresponsive thermostat, no call-for-heat or call-for-cooling, and no blower operation. In many cases, a blown fuse on the transformer or a shorted secondary winding is the culprit before the unit ever trips a high-limit or safety switch.

  • Specs: Input voltage: 208/240V | Output voltage: 24V | Power rating: 40VA | Frequency: 50/60 Hz | Factory-matched OEM dimensions and mounting footprint
  • OEM vs Generic: OEM transformers are wound to exact VA and impedance tolerances. Undersized or off-tolerance generic transformers can overheat, blow control fuses repeatedly, or fail to sustain 24V under full relay load — causing nuisance lockouts and premature board failures.
  • Install difficulty: 2/5 — Shut off all power at the breaker and verify zero voltage before disconnecting wiring. Tools needed: flathead and Phillips screwdrivers, multimeter, wire labels or smartphone for wiring photo. Reconnect all low-voltage leads exactly as removed. Always check for a shorted thermostat wire that may have caused the original failure.
  • Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed as a direct OEM replacement for Carrier model PY3PNA036060AB. Verify input voltage (208/240V) and VA rating (40VA) match your unit's data plate before ordering. Have a question about fitment? Our HVAC parts specialists verify compatibility before you buy — contact us 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 $99
  • 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 info@nationalhvacparts.com to initiate a return
  • Refunds processed within 5-7 business days

Frequently Asked Questions

Does this Transformer fit my Carrier PY3PNA036060AB?
Yes. This is the factory-specified OEM transformer for the Carrier PY3PNA036060AB. 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 Carrier PY3PNA036060AB?
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 Carrier 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 Carrier 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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Mike Rivera
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