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OEM Carrier Transformer 50VA 120/240-24V — UPFLOW100HCU%12
Carrier

OEM Carrier Transformer 50VA 120/240-24V — UPFLOW100HCU%12

SKU: CARRIE-UPFLOW100HCU%12-TRANSFORMER-P201-35150 Brand: Carrier

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Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

OEM Carrier Transformer 50VA 120/208/240-12/24V for Model UPFLOW100HCU%12

The Carrier P201-35150 is the factory-specified step-down transformer for the UPFLOW100HCU%12 upflow air handler. It converts incoming line voltage (120, 208, or 240 VAC) down to a safe 12/24 VAC to power the system's control board, thermostat, and all low-voltage control circuits. When this transformer fails, the entire control circuit loses power — resulting in a completely unresponsive thermostat, a dark control board, or a system that refuses to start in any mode. Replacing it with the correct OEM unit restores factory-specified voltage regulation and protects sensitive downstream electronics.

  • Specs: 50VA rating | Primary: 120/208/240 VAC multi-tap | Secondary: 12/24 VAC | 60 Hz | Single phase | CSA listed | OEM Part # P201-35150
  • OEM vs Generic: This is a genuine Carrier/Totaline factory part, ensuring exact VA rating, impedance, and terminal layout. Generic transformers often carry ±15% VA tolerances that can under-power boards or trip internal thermal protectors prematurely.
  • Install difficulty: 2/5 — Shut off power at the breaker before starting. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter to verify 24V output after installation. Label all wires before disconnecting the old transformer. Confirm primary tap matches your supply voltage.
  • Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse when ordered before cutoff.

Compatibility: Designed for the Carrier UPFLOW100HCU%12 upflow air handler. Verify your unit's data plate supply voltage (120V or 240V) to ensure you connect to the correct primary tap on installation. Questions about fitment? Our HVAC parts specialists confirm compatibility before you order — contact us today and get back to comfort 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 120/240-24V — UPFLOW100HCU%12?
Yes. This is the factory-specified OEM transformer for the Carrier OEM Carrier Transformer 50VA 120/240-24V — UPFLOW100HCU%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 OEM Carrier Transformer 50VA 120/240-24V — UPFLOW100HCU%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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