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OEM Carrier 40VA Transformer 120V-24V for YAC48110YAC304AC
Carrier

OEM Carrier 40VA Transformer 120V-24V for YAC48110YAC304AC

SKU: CARRIE-YAC48110YAC304AC-TRANSFORMER-P201-35150 Brand: Carrier
✓ Guaranteed to fit YAC48110YAC304AC — or your money back. Terms

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Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

OEM Carrier 40VA Control Transformer 120V/24V for Model YAC48110YAC304AC

This OEM step-down transformer (part number P201-35150) is the factory-specified replacement for Carrier YAC48110YAC304AC packaged units. The transformer steps down 120V line voltage to the 24V AC signal required to power thermostats, contactors, control boards, and all low-voltage safety circuits. When it fails, the entire control circuit goes dead — the thermostat loses power, nothing responds to a call for heating or cooling, and fuses may blow repeatedly due to a shorted secondary winding.

  • Specs: Primary voltage: 120V AC | Secondary voltage: 24V AC | VA rating: 40VA | OEM part number: P201-35150 | Factory-matched windings and insulation class
  • OEM vs Generic: OEM transformers are wound and tested to Carrier's exact VA rating and insulation spec. Off-brand units often underperform under sustained 24V load, causing nuisance lockouts or premature secondary burnout.
  • Install difficulty: 2/5 — Disconnect all power before servicing. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to verify 24V output after install). Always inspect low-voltage wiring for shorts before replacing — a shorted load will burn out a new transformer just as quickly.
  • Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Direct OEM replacement for Carrier model YAC48110YAC304AC. Verify primary voltage (120V) and VA rating on your unit's data plate before ordering. If you're unsure of fitment, our HVAC parts team confirms compatibility before you buy — no guesswork required.

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 YAC48110YAC304AC?
Yes. This is the factory-specified OEM transformer for the Carrier YAC48110YAC304AC. 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 YAC48110YAC304AC?
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
HVAC Parts Specialist — Online