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OEM Carrier Control Transformer 40VA 208/230V — PF1MNB036010AAAA
Carrier

OEM Carrier Control Transformer 40VA 208/230V — PF1MNB036010AAAA

SKU: CARRIE-PF1MNB036010AAAA-TRANSFORMER-HT01CN241 Brand: Carrier
✓ Guaranteed to fit PF1MNB036010AAAA — or your money back. Terms

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Texas CMBL #19328542014
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Govt POs Accepted

OEM Carrier Control Transformer 40VA 208/230V–24V for Model PF1MNB036010AAAA

This is the genuine OEM Carrier replacement control transformer (part number HT01CN241) for the Carrier PF1MNB036010AAAA fan coil and air handler unit. The transformer steps down the 208/230V line-voltage power supply to the 24V AC signal that energizes your thermostat, control board, contactors, and all low-voltage safety circuits. When this transformer fails, the entire control circuit goes dark — the system will not respond to thermostat calls, the display may go blank, and no heating or cooling function will operate. If you're measuring 0V at the 24V secondary terminals with line voltage confirmed at the primary, this transformer is almost certainly the cause.

  • Specs: 208/230V primary input | 24V AC secondary output | 40VA power rating | Factory-matched Basler Electric design | Direct plug-in replacement, no wiring modifications required
  • OEM vs Generic: OEM transformers are wound to exact VA tolerances and insulation class ratings. Undersized generic transformers can overheat, trip their internal thermal fuse, or fail to supply adequate current to modern multi-stage control boards — causing intermittent lockouts that are difficult to diagnose.
  • Install difficulty: 2/5 — Always shut off the main disconnect and verify zero voltage before starting. Tools needed: multimeter, flathead and Phillips screwdrivers, wire nuts or quick-connect terminals. Label all low-voltage wires before disconnecting. Confirm 24V output at secondary terminals after installation before restoring full system power.
  • Warranty: 1-year OEM manufacturer's warranty. In-stock units ship the same business day when ordered before cutoff.

Compatibility: Designed as the factory-specified replacement transformer for the Carrier PF1MNB036010AAAA fan coil unit. Verify your unit's data plate shows a 208/230V primary and 24V/40VA control circuit before ordering. Our parts specialists are available to confirm fitment — reach out before you order if you have any questions. Order now and we'll ship 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 OEM Carrier Control Transformer 40VA 208/230V — PF1MNB036010AAAA?
Yes. This is the factory-specified OEM transformer for the Carrier OEM Carrier Control Transformer 40VA 208/230V — PF1MNB036010AAAA. 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 Control Transformer 40VA 208/230V — PF1MNB036010AAAA?
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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