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OEM Carrier Transformer 40VA 208/230V–24V for PF4MNA043000ABAA
Carrier

OEM Carrier Transformer 40VA 208/230V–24V for PF4MNA043000ABAA

SKU: CARRIE-PF4MNA043000ABAA-TRANSFORMER-HT01CN241 Brand: Carrier
✓ Guaranteed to fit PF4MNA043000ABAA — or your money back. Terms

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Texas CMBL #19328542014
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OEM Carrier Control Transformer 40VA 208/230V–24V for Model PF4MNA043000ABAA

This OEM Carrier transformer (part number HT01CN241) is the factory-specified replacement for the Carrier PF4MNA043000ABAA air handler. The transformer steps down 208/230V line voltage to the 24V AC signal that powers the entire control circuit — including the thermostat, control board, zone valves, and relays. When this part fails, the system goes completely silent: no blower response, no thermostat communication, and no heating or cooling calls answered. Replacing a failed transformer is one of the most cost-effective HVAC repairs available.

  • Specs: 208/230V Primary | 24V Secondary | 40VA rated | OEM part number HT01CN241 | Direct factory-spec replacement
  • OEM vs Generic: OEM transformers are wound and rated to Carrier's exact VA and voltage specifications, preventing damaging voltage sags under peak control-circuit load. Generic alternatives often fall short of 40VA true capacity, risking premature failure of downstream boards and contactors.
  • Install difficulty: 2/5 — Shut off all power before servicing. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Photograph all wiring connections before disconnecting. Verify primary voltage matches your supply before powering back on.
  • Warranty: 1-year OEM manufacturer warranty. In-stock units ship same business day from our warehouse when ordered before cutoff.

Compatibility: Engineered for the Carrier PF4MNA043000ABAA air handler. Verify your existing transformer's primary voltage (208/230V), secondary voltage (24V), and VA rating (40VA) on the unit's data plate or existing transformer label before ordering. Our fitment team is available to confirm compatibility before you buy — call or chat today.

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 PF4MNA043000ABAA?
Yes. This is the factory-specified OEM transformer for the Carrier PF4MNA043000ABAA. 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 PF4MNA043000ABAA?
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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