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OEM Carrier Transformer 40VA 208/230V-24V for PF4MNA031T00ABAA
Carrier

OEM Carrier Transformer 40VA 208/230V-24V for PF4MNA031T00ABAA

SKU: CARRIE-PF4MNA031T00ABAA-TRANSFORMER-HT01CN241 Brand: Carrier
✓ Guaranteed to fit PF4MNA031T00ABAA — or your money back. Terms

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Texas CMBL #19328542014
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Govt POs Accepted

OEM Carrier 40VA Control Transformer 208/230V–24V for Model PF4MNA031T00ABAA

This OEM control transformer (part number HT01CN241) is the factory-specified replacement for the Carrier PF4MNA031T00ABAA fan coil and air handler. The transformer steps down 208/230V line voltage to the 24V signal used by your thermostat, control board, and all low-voltage components. When this part fails, the entire control circuit goes dead — your thermostat goes blank, the system won't respond to any calls for heating or cooling, and nothing powers on despite line voltage being present at the unit.

  • Specs: 208/230V Primary | 24V Secondary | 40VA capacity | Direct OEM drop-in replacement (Part # HT01CN241)
  • OEM vs Generic: This is a genuine Carrier Factory Authorized Part, built to exact factory tolerances. Generic transformers often use undersized VA ratings and inferior core materials, leading to premature burnout and nuisance tripped fuses on the 24V circuit.
  • Install difficulty: 2/5 — Shut off all power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Note primary and secondary wire colors before disconnecting, and confirm VA rating on your unit's data plate. The transformer mounts via foot bracket with two screws.
  • Warranty: 1-year OEM manufacturer warranty. In stock and ships same business day from our warehouse.

Compatibility: Engineered for the Carrier PF4MNA031T00ABAA fan coil/air handler. Verify 208/230V primary voltage and 24V secondary on your system's data plate before ordering. Not sure it fits? Our HVAC parts specialists verify fitment before you buy — order with confidence and get back to comfort fast.

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 PF4MNA031T00ABAA?
Yes. This is the factory-specified OEM transformer for the Carrier PF4MNA031T00ABAA. 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 PF4MNA031T00ABAA?
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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