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OEM Carrier Control Transformer 40VA 208/230V for PY3GNA036090AB
Carrier

OEM Carrier Control Transformer 40VA 208/230V for PY3GNA036090AB

SKU: CARRIE-PY3GNA036090AB-TRANSFORMER-HT01BD209 Brand: Carrier
✓ Guaranteed to fit PY3GNA036090AB — or your money back. Terms

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Texas CMBL #19328542014
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OEM Carrier Control Transformer 40VA 208/230V — HT01BD209 for Model PY3GNA036090AB

This OEM Carrier control transformer (part # HT01BD209) is the factory-specified replacement for the Carrier PY3GNA036090AB packaged unit. The transformer steps down line voltage (208/230V primary) to the 24V control circuit voltage that powers your thermostat, contactor coil, gas valve, and all low-voltage controls. When this transformer fails, nothing in the control system responds — the unit will not start, the thermostat goes dead, and no fault codes will display because the board itself loses power.

  • Specs: 208/230V primary input | 24V secondary output | 40VA rated | 50/60 Hz | Class 2 control transformer | Replaces HT01BD207, HT01CN232, 9076-00
  • OEM vs Generic: This genuine Carrier OEM part is wound to exact factory VA and voltage tolerances. Under-rated or off-brand transformers are a leading cause of repeated low-voltage fuse failures and nuisance lockouts — an OEM replacement eliminates that risk entirely.
  • Install difficulty: 3/5 — Shut off all power at the disconnect and breaker before beginning. Tools needed: multimeter (to verify 24V output post-install), flathead and Phillips screwdrivers, wire strippers, needle-nose pliers. Always photograph existing wiring connections before removing the old unit. Check for a blown 3A or 5A low-voltage fuse — a shorted control wire may have caused the original failure.
  • Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse.

Compatibility: Engineered as a direct OEM replacement for Carrier PY3GNA036090AB packaged units. Verify your unit's data plate shows 208/230V supply voltage before ordering. Cross-references OEM part numbers HT01BD207, HT01CN232, and 4000A46E07AE28. Have questions about fit? Our HVAC parts specialists confirm compatibility before you order — contact us today and get your unit back online fast.

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 PY3GNA036090AB?
Yes. This is the factory-specified OEM transformer for the Carrier PY3GNA036090AB. 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 PY3GNA036090AB?
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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