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OEM Carrier Transformer 208/230V–24V 40VA for PF4MNA031T00AAAA
Carrier

OEM Carrier Transformer 208/230V–24V 40VA for PF4MNA031T00AAAA

SKU: CARRIE-PF4MNA031T00AAAA-TRANSFORMER-HT01CN241 Brand: Carrier
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OEM Carrier Control Transformer 208/230V–24V 40VA for Model PF4MNA031T00AAAA

This OEM Carrier transformer (part #HT01CN241) is the factory-specified 40VA step-down transformer for the Carrier PF4MNA031T00AAAA fan coil and air handler series. The transformer converts 208/230V line voltage down to the 24V AC signal that powers the entire low-voltage control circuit — including the thermostat, contactor coil, and control board. When this part fails, the result is typically a completely unresponsive system: the thermostat goes blank, the unit ignores all calls for heating or cooling, or a fuse on the control board blows repeatedly. Replacing the transformer is one of the most definitive repairs in HVAC service.

  • Specs: 208/230V primary | 24V secondary | 40VA rated | OEM part number HT01CN241 | Factory-matched to Carrier PF4MNA031T00AAAA specifications
  • OEM vs Generic: OEM transformers are wound and tested to exact Carrier factory tolerances, ensuring stable 24V output under full load. Generic units may sag under load, causing intermittent lockouts, nuisance tripped fuses, or premature control board failure.
  • Install difficulty: 2/5 — Shut off power at the disconnect and breaker before beginning. Tools needed: multimeter (verify 0V before touching terminals), flathead and Phillips screwdrivers, wire stripper, needle-nose pliers. Label all low-voltage wires before disconnecting. Confirm fuse integrity on the control board before energizing.
  • Warranty: 1-year OEM manufacturer warranty. In-stock units ship same business day from our warehouse when ordered by 3 PM local time.

Compatibility: Engineered as a direct OEM replacement for Carrier model PF4MNA031T00AAAA fan coil units. Also used across Carrier, Bryant, and ICP-family air handlers sharing the HT01CN241 specification. Always verify primary voltage (208V or 230V) and VA rating on your unit's data plate before ordering. Our fitment team is available to confirm compatibility — contact us before you order.

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 PF4MNA031T00AAAA?
Yes. This is the factory-specified OEM transformer for the Carrier PF4MNA031T00AAAA. 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 PF4MNA031T00AAAA?
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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