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OEM Carrier Transformer 50VA 120/208/240-12/24V — YAC36100YAC305
Carrier

OEM Carrier Transformer 50VA 120/208/240-12/24V — YAC36100YAC305

SKU: CARRIE-YAC36100YAC305-TRANSFORMER-P201-35150 Brand: Carrier

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Texas CMBL #19328542014
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Govt POs Accepted

OEM Carrier 50VA Control Transformer 120/208/240-12/24V for Model YAC36100YAC305

This factory-authorized OEM transformer (Part # P201-35150) is the exact replacement for the Carrier YAC36100YAC305 HVAC system. The transformer steps down 120/208/240V line voltage to a safe 12/24VAC output to power the control board, thermostat, and all low-voltage circuits. When this part fails, the entire control circuit loses power — symptoms include a thermostat with no display, a system that won't respond to any commands, or a unit that appears completely dead despite having line voltage present.

  • Specs: 50VA rating | Primary: 120/208/240 VAC | Secondary: 12/24 VAC | Single-phase | 60 Hz | CSA listed | OEM Part # P201-35150
  • OEM vs Generic: This is a genuine Carrier/Totaline factory-authorized part meeting exact VA and voltage tolerances. Undersized or off-tolerance aftermarket transformers can cause erratic board behavior, nuisance trips, or premature control board failure.
  • Install difficulty: 3/5 — Shut off all power at the disconnect and breaker before proceeding. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter, wire labels. Always photograph or document all wire connections before removal. Incorrect wiring of primary taps can damage downstream components.
  • Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Engineered as a direct OEM replacement for Carrier model YAC36100YAC305. Verify your unit's data plate confirms a 50VA, 120/208/240-12/24V transformer requirement before ordering. Cross-references Totaline P201-35150. Need fitment confirmation? Our HVAC parts specialists verify compatibility before you buy — contact us today and get your system 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 $75
  • 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 Transformer 50VA 120/208/240-12/24V — YAC36100YAC305?
Yes. This is the factory-specified OEM transformer for the Carrier OEM Carrier Transformer 50VA 120/208/240-12/24V — YAC36100YAC305. 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 Transformer 50VA 120/208/240-12/24V — YAC36100YAC305?
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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