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 Transformer 50VA 120/240-24V for YAC48110YAC103AT
Carrier

OEM Carrier Transformer 50VA 120/240-24V for YAC48110YAC103AT

SKU: CARRIE-YAC48110YAC103AT-TRANSFORMER-P201-35150 Brand: Carrier
✓ Guaranteed to fit YAC48110YAC103AT — 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 50VA 120/208/240–12/24V for Model YAC48110YAC103AT

This OEM Carrier transformer (part # P201-35150) is the factory-specified step-down transformer for the Carrier YAC48110YAC103AT packaged unit. It converts high-voltage line power (120, 208, or 240 VAC) down to a safe 12/24VAC to energize the system's control board, thermostat circuit, and all low-voltage components. When this transformer fails, the entire control circuit goes dead — the thermostat goes blank, the system won't respond to any call for heating or cooling, and contactors or relays won't energize.

  • Specs: 50VA rating | 120/208/240 VAC primary | 12/24V secondary | 60 Hz | Single-phase | CSA listed | Factory cross-reference: Totaline HCTY156D0LS11102
  • OEM vs Generic: This is a genuine Carrier factory-authorized part manufactured to exact VA and impedance tolerances. Off-brand transformers rated at nominal 50VA often run underspec, causing nuisance tripping of control fuses or premature failure of downstream boards.
  • Install Difficulty: 2/5 — Disconnect power at the disconnect box before servicing. Tools needed: flathead and Phillips screwdrivers, wire nuts or push-in connectors, multimeter (to verify 24VAC output after install). Always photograph existing wiring before disconnecting leads.
  • Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Direct OEM replacement for Carrier model YAC48110YAC103AT. Verify your unit's data plate shows a 50VA, 120/208/240-12/24V transformer requirement before ordering. Have a question about fitment? Our HVAC parts specialists confirm compatibility before you buy — order with confidence and get back up and running 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 YAC48110YAC103AT?
Yes. This is the factory-specified OEM transformer for the Carrier YAC48110YAC103AT. 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 YAC48110YAC103AT?
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