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OEM Carrier 40VA Transformer 120V–24V for P110100 — P201-2201
Carrier

OEM Carrier 40VA Transformer 120V–24V for P110100 — P201-2201

SKU: CARRIE-P110100-TRANSFORMER-P201-2201 Brand: Carrier

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Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

OEM Carrier 40VA Control Transformer 120V–24V for Model P110100

This OEM control transformer (part number P201-2201) is the factory-specified replacement for the Carrier P110100 HVAC system. The transformer steps down 120V line voltage to the 24V signal required by your thermostat, control board, and all low-voltage control circuits. When it fails, the entire control system goes dark — the thermostat loses power, relays won't energize, and the system makes no response to any call for heating or cooling. It is often the first component to check when absolutely nothing works.

  • Specs: 40VA rated | 120V primary / 24V secondary | OEM part number P201-2201 | Factory-matched output for stable control circuit voltage
  • OEM vs Generic: OEM transformers are wound and insulated to Carrier's exact VA and voltage tolerances. Undersized or off-spec generic units can sag under load, causing erratic thermostat behavior, nuisance lockouts, and premature control board failure.
  • Install difficulty: 2/5 — Disconnect all power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Label all low-voltage wires before disconnecting. Confirm secondary output reads 24–28V AC with a meter before closing the panel.
  • Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed specifically for the Carrier P110100 HVAC system using OEM part number P201-2201. Always verify your existing transformer's VA rating and primary/secondary voltages on the data plate before ordering. If you are unsure about fitment, our parts team is happy to confirm compatibility 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 $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 P110100 — P201-2201?
Yes. This is the factory-specified OEM transformer for the Carrier P110100 — P201-2201. 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 P110100 — P201-2201?
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
HVAC Parts Specialist — Online