What are the specs for this Transformer?

The correct replacement for Carrier model OEM Carrier 40VA Transformer 24V Control Circuit — UPFLOW100FAUHAC14 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 OEM Carrier 40VA Transformer 24V Control Circuit — UPFLOW100FAUHAC14.

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 24V Control Circuit — UPFLOW100FAUHAC14

Name: OEM Carrier 40VA Transformer 24V Control Circuit — UPFLOW100FAUHAC14
Brand: Carrier
SKU: CARRIE-UPFLOW100FAUHAC14-TRANSFORMER-P201-35150
Price: 47.25 USD
Availability: InStock

SKU: CARRIE-UPFLOW100FAUHAC14-TRANSFORMER-P201-35150 Brand: Carrier

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OEM Carrier 40VA Control Transformer P201-35150 for Model UPFLOW100FAUHAC14

This OEM control transformer is the factory-specified replacement for the Carrier UPFLOW100FAUHAC14 upflow air handler. The transformer steps down 120V line voltage to the 24V AC signal that powers your thermostat circuit, control board, and all safety relays. When it fails, the entire control circuit goes dark — your thermostat becomes unresponsive, the system won't call for heat or cooling, and no error codes are generated because there's simply no power to produce them.

Specs: 120V primary | 24V secondary | 40VA rated | Class 2 control circuit transformer | Factory-matched OEM replacement for part number P201-35150
OEM vs Generic: This OEM transformer meets Carrier's exact VA rating and insulation class. Undersized or off-brand transformers frequently trip on thermal overload or fail to sustain 24V under full relay load, causing nuisance lockouts and premature board damage.
Install difficulty: 2/5 — Disconnect power at the breaker before beginning. Tools needed: flathead and Phillips screwdriver, multimeter, wire nuts or terminals. Verify primary and secondary voltage with your multimeter after install before re-energizing the full system.
Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse.

Compatibility: Designed for the Carrier UPFLOW100FAUHAC14 upflow air handler. Always verify the 120V primary / 24V secondary / 40VA specification against your unit's wiring diagram or data plate before ordering. Our fitment team is available to confirm compatibility — reach out before you buy.

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 24V...

$47.25

Frequently Asked Questions

Does this Transformer fit my Carrier OEM Carrier 40VA Transformer 24V Control Circuit — UPFLOW100FAUHAC14?

Yes. This is the factory-specified OEM transformer for the Carrier OEM Carrier 40VA Transformer 24V Control Circuit — UPFLOW100FAUHAC14. 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 40VA Transformer 24V Control Circuit — UPFLOW100FAUHAC14?

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 24V Control Circuit — UPFLOW100FAUHAC14

OEM Carrier 40VA Control Transformer P201-35150 for Model UPFLOW100FAUHAC14

Shipping Information

Return Policy

Frequently Asked Questions