What are the specs for this Transformer?

The correct replacement for Carrier model UPFLOW100FAUAC14A is this exact part. It is the factory-specified replacement with exact OEM specifications. Using a part with different specifications can cause equipment damage or void your warranty. You can verify this by checking the data plate on your Carrier equipment which lists the model number UPFLOW100FAUAC14A.

Is this transformer compatible with Bryant or Payne systems too?

Many Carrier parts are cross-compatible with Bryant and Payne systems since all three brands are manufactured by Carrier Global Corporation. The same physical part is often used across multiple brand labels with different model numbers. To verify cross-compatibility, check your Bryant or Payne equipment service manual for cross-compatible part numbers, or contact info@nationalhvacparts.com with your model number for confirmation.

Carrier

OEM Carrier 40VA Transformer P201-35150 for UPFLOW100FAUAC14A

Name: OEM Carrier 40VA Transformer P201-35150 for UPFLOW100FAUAC14A
Brand: Carrier
SKU: CARRIE-UPFLOW100FAUAC14A-TRANSFORMER-P201-35150
Price: 47.25 USD
Availability: InStock

SKU: CARRIE-UPFLOW100FAUAC14A-TRANSFORMER-P201-35150 Brand: Carrier

✓ Guaranteed to fit UPFLOW100FAUAC14A — or your money back. Terms

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OEM Carrier 40VA Control Transformer P201-35150 for Model UPFLOW100FAUAC14A

This OEM control transformer (part number P201-35150) is the factory-specified replacement for the Carrier UPFLOW100FAUAC14A upflow gas furnace. The transformer steps down 120V line voltage to the 24V AC signal that powers the thermostat, control board, gas valve, and all low-voltage safety circuits. When it fails, the entire control circuit goes dark — your thermostat goes blank, the furnace ignores calls for heat, and nothing responds. Replacing it with the correct OEM part restores full system operation immediately.

Specs: 40VA rating | 120V primary / 24V secondary | Factory-matched wire leads | Designed for continuous duty in enclosed furnace cabinets
OEM vs Generic: This is the factory-original Carrier transformer engineered to exact VA and voltage tolerances for the UPFLOW100FAUAC14A. Generic transformers often run undersized VA ratings, causing chronic overloads, nuisance trips, and premature control board failure.
Install difficulty: 2/5 — Disconnect power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or spade connectors. Label or photograph existing wiring connections before removal. Verify 24V output at secondary leads with a multimeter after install.
Warranty: 1-year OEM factory warranty against defects. In-stock and ships same business day from our warehouse.

Compatibility: Engineered for the Carrier UPFLOW100FAUAC14A upflow gas furnace. Always verify the 40VA rating and 120V/24V configuration on your unit's data plate or wiring diagram before ordering. Our parts specialists are available to confirm fitment before you buy — no guesswork required.

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

OEM Carrier 40VA Transformer P20...

$47.25

Frequently Asked Questions

Does this Transformer fit my Carrier UPFLOW100FAUAC14A?

Yes. This is the factory-specified OEM transformer for the Carrier UPFLOW100FAUAC14A. 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 UPFLOW100FAUAC14A?

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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OEM Carrier 40VA Transformer P201-35150 for UPFLOW100FAUAC14A

OEM Carrier 40VA Control Transformer P201-35150 for Model UPFLOW100FAUAC14A

Shipping Information

Return Policy

Frequently Asked Questions