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OEM Carrier Transformer 50VA 120/240-24V for UPFLOW100HCU12A
Carrier

OEM Carrier Transformer 50VA 120/240-24V for UPFLOW100HCU12A

SKU: CARRIE-UPFLOW100HCU12A-TRANSFORMER-P201-35150 Brand: Carrier
✓ Guaranteed to fit UPFLOW100HCU12A — or your money back. Terms

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Texas CMBL #19328542014
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OEM Carrier 50VA Control Transformer P201-35150 for Model UPFLOW100HCU12A

This is the genuine OEM step-down transformer for the Carrier UPFLOW100HCU12A upflow air handler. The transformer converts incoming line voltage (120/208/240 VAC) down to a safe 24V AC to power your system's control board, thermostat wiring, and low-voltage accessories. When this transformer fails, the entire control circuit loses power — resulting in a completely unresponsive system, a blank thermostat, or a blower that runs non-stop without any heating or cooling command. Replacing it with the correct OEM part restores factory-spec voltage delivery and protects downstream electronics.

  • Specs: 50 VA rating | Primary: 120/208/240 VAC | Secondary: 12/24 VAC | 60 Hz | Single-phase | CSA Listed | OEM Part # P201-35150
  • OEM vs Generic: This is a Carrier factory-authorized Totaline part built to exact VA and voltage tolerances. Generic transformers may be under-rated in VA, causing thermal overload and premature failure — particularly in systems with multiple 24V accessories (humidifiers, zone boards, ERVs).
  • Install difficulty: 3/5 — Disconnect power at the breaker and verify zero voltage before working. Tools needed: multimeter, flathead and Phillips screwdrivers, wire nuts or spade terminals. Label all low-voltage wires before disconnecting. Confirm secondary voltage output with a meter after installation before restoring system power.
  • Warranty: 1-year OEM manufacturer warranty. Ships same business day from our warehouse when ordered before cutoff.

Compatibility: Designed for the Carrier UPFLOW100HCU12A upflow air handler. Always verify your unit's data plate primary voltage (120V or 240V) matches this transformer's dual-primary configuration before installation. Questions about fitment? Our HVAC parts specialists confirm compatibility before you order — ships same day.

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 UPFLOW100HCU12A?
Yes. This is the factory-specified OEM transformer for the Carrier UPFLOW100HCU12A. 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 UPFLOW100HCU12A?
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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