Same-day shipping before 3PM CST · 35,000+ OEM Parts · Texas CMBL & SAM.gov Registered · Government POs Accepted

Menu

Home Shop All Account Cart
OEM Carrier Control Transformer 40VA 120V/24V — PY3PPA036060NB
Carrier

OEM Carrier Control Transformer 40VA 120V/24V — PY3PPA036060NB

SKU: CARRIE-PY3PPA036060NB-TRANSFORMER-HT01BD209 Brand: Carrier
✓ Guaranteed to fit PY3PPA036060NB — or your money back. Terms

OEM Guaranteed

Same-Day Ship

30-Day Returns

Secure Checkout

Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

OEM Carrier Control Transformer 40VA 120V/24V for Model PY3PPA036060NB

This OEM control transformer (part number HT01BD209) is the factory-specified replacement for the Carrier PY3PPA036060NB packaged unit. The transformer steps down 120V line voltage to the 24V signal that powers your thermostat, contactor coil, and all low-voltage control logic. When it fails — due to a wiring short, overloaded secondary, or age — the entire control circuit goes dead: the thermostat goes blank, the system refuses to start, and no error codes are produced because the board itself has no power.

  • Specs: 40VA rating | 120V primary / 24V secondary | OEM part number HT01BD209 | Factory-matched winding and enclosure dimensions for direct drop-in fit
  • OEM vs Generic: This is the genuine Carrier factory part. OEM transformers are wound to exact VA and voltage tolerances, protecting sensitive control boards. Generic units often run hot under load and can fail prematurely or damage downstream components.
  • Install Difficulty: 2/5 — Disconnect power at the breaker and verify zero voltage before handling. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Always identify and eliminate the secondary short before installing the new transformer or it will blow immediately.
  • Warranty: 1-year OEM factory warranty. Orders ship same business day from our warehouse when placed before 3 PM local time.

Compatibility: Engineered as a direct OEM replacement for the Carrier PY3PPA036060NB packaged unit. Always confirm the 120V/24V 40VA specification against your unit's wiring diagram and data plate before ordering. Have your model number ready — our fitment team is available to verify compatibility 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 $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 OEM Carrier Control Transformer 40VA 120V/24V — PY3PPA036060NB?
Yes. This is the factory-specified OEM transformer for the Carrier OEM Carrier Control Transformer 40VA 120V/24V — PY3PPA036060NB. 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 OEM Carrier Control Transformer 40VA 120V/24V — PY3PPA036060NB?
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.
Home Shop Search Account Cart
Fitment Guaranteed
MR
Mike Rivera
HVAC Parts Specialist — Online