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OEM Carrier Transformer 50VA 120/240V–24V for UPFLOW120HCU%12
Carrier

OEM Carrier Transformer 50VA 120/240V–24V for UPFLOW120HCU%12

SKU: CARRIE-UPFLOW120HCU%12-TRANSFORMER-P201-35150 Brand: Carrier
✓ Guaranteed to fit UPFLOW120HCU%12 — or your money back. Terms

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Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

OEM Carrier 50VA Control Circuit Transformer P201-35150 for Model UPFLOW120HCU%12

This is the genuine OEM step-down transformer for the Carrier UPFLOW120HCU%12 upflow gas furnace. The transformer converts incoming line voltage (120/208/240 VAC) down to a safe 12/24 VAC to power the furnace's control board, thermostat, and all low-voltage control circuit devices. When this transformer fails, the entire control circuit loses power — symptoms include a completely unresponsive thermostat, no inducer startup, and full system lockout with no error codes displayed. Replacing the transformer is one of the first diagnostic steps when the furnace shows zero signs of life despite confirmed line voltage at the unit.

  • Specs: 50 VA rating | Primary: 120/208/240 VAC | Secondary: 12/24 VAC | 60 Hz single-phase | CSA listed | OEM part number P201-35150
  • OEM vs Generic: This factory Carrier/Totaline OEM transformer is wound and rated to exact VA and voltage tolerances. Generic substitutes often run at lower VA ratings, causing nuisance tripping on the internal thermal overload and premature control board damage.
  • Install difficulty: 2/5 — Disconnect power at the breaker and verify zero voltage before starting. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter, wire nuts or spade connectors. Photograph all low-voltage wiring before disconnecting. Confirm secondary voltage output (24 VAC ±10%) with a multimeter after installation.
  • Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Direct OEM replacement for Carrier UPFLOW120HCU%12 upflow furnaces. Verify your unit's data plate primary voltage configuration (120V or 240V tap) before wiring. This transformer supports both voltage inputs, making it suitable across multi-voltage installations. Questions about fitment? Our HVAC parts specialists verify compatibility before you order — contact us today.

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 UPFLOW120HCU%12?
Yes. This is the factory-specified OEM transformer for the Carrier UPFLOW120HCU%12. 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 UPFLOW120HCU%12?
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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