Same-day shipping before 3PM CST · 35,000+ OEM Parts · Texas CMBL & SAM.gov Registered · Government POs Accepted

Menu

Home Shop All Account Cart
OEM Carrier 40VA Transformer P201-35150 for UPFLOW120HCU12A
Carrier

OEM Carrier 40VA Transformer P201-35150 for UPFLOW120HCU12A

SKU: CARRIE-UPFLOW120HCU12A-TRANSFORMER-P201-35150 Brand: Carrier
✓ Guaranteed to fit UPFLOW120HCU12A — or your money back. Terms

OEM Guaranteed

Same-Day Ship

30-Day Returns

Secure Checkout

Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

OEM Carrier 40VA Control Transformer P201-35150 for Model UPFLOW120HCU12A

This OEM control transformer (part# P201-35150) is the factory-specified replacement for the Carrier UPFLOW120HCU12A upflow gas furnace. The transformer steps down 120V line voltage to 24V AC to power the entire low-voltage control circuit — including the thermostat, gas valve, inducer relay, and control board. When the transformer fails, the entire control system goes dead: the thermostat loses power, nothing calls for heat or cooling, and the furnace will not respond to any input. A shorted transformer will often trip or blow the low-voltage fuse repeatedly.

  • Specs: 40VA rated | Primary: 120V AC | Secondary: 24V AC | Factory-matched OEM tolerances | Direct plug-in replacement for P201-35150
  • OEM vs Generic: This is the genuine OEM Carrier transformer — built to exact VA rating and insulation class for the UPFLOW120HCU12A. Generic transformers may under-rate VA capacity, causing overheating and repeated fuse failures under normal load.
  • Install difficulty: 2/5 — Shut off power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, 1/4" nut driver, multimeter (to verify 24V output after install). Photograph wiring connections before disconnecting. Reconnect primary (120V) leads and secondary (24V) leads to matching terminals.
  • Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Engineered as a direct OEM replacement for the Carrier UPFLOW120HCU12A upflow gas furnace. Verify primary voltage (120V), secondary voltage (24V), and VA rating on your existing transformer's label before ordering to confirm fitment. Have questions about compatibility? Our HVAC parts specialists verify fitment before you order — reach out before purchasing.

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 UPFLOW120HCU12A?
Yes. This is the factory-specified OEM transformer for the Carrier UPFLOW120HCU12A. 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 UPFLOW120HCU12A?
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.
Home Shop Search Account Cart
Fitment Guaranteed
MR
Mike Rivera
HVAC Parts Specialist — Online