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OEM Carrier Transformer 40VA 208/230V→24V for PF1MNA071000ACAA
Carrier

OEM Carrier Transformer 40VA 208/230V→24V for PF1MNA071000ACAA

SKU: CARRIE-PF1MNA071000ACAA-TRANSFORMER-HT01CN236 Brand: Carrier

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Texas CMBL #19328542014
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Govt POs Accepted

OEM Carrier 40VA Transformer HT01CN236 for Model PF1MNA071000ACAA

This OEM Carrier transformer (part number HT01CN236) is the factory-specified control circuit transformer for the Carrier PF1MNA071000ACAA fan coil air handler. Its job is to step down the 208/230V line voltage to a safe 24V AC signal that powers the thermostat, control board, relays, and all low-voltage components throughout the system. When this transformer fails, the entire control circuit goes dark — the thermostat loses power, the system stops responding to calls for heating or cooling, and the unit will not operate at all.

  • Specs: 40VA output capacity | 208/230V primary input | 24V secondary output | 60Hz | Direct OEM replacement for Carrier part number HT01CN236
  • OEM vs Generic: This is a genuine Carrier OEM transformer wound to exact factory VA and voltage specifications. Aftermarket units can run under-rated VA, causing voltage sag under load, nuisance lockouts, and premature control board failure.
  • Install difficulty: 2/5 — Disconnect all power before servicing. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter (verify 24V output after install). Label all low-voltage wires before disconnecting. Confirm primary voltage matches your supply before energizing.
  • Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed as a direct OEM replacement for the Carrier PF1MNA071000ACAA fan coil air handler. Always verify your existing transformer's VA rating and primary voltage from the unit data plate before ordering. Have questions about fitment? Our HVAC parts specialists confirm compatibility before you buy — order with confidence and get back up and running 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 $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 PF1MNA071000ACAA?
Yes. This is the factory-specified OEM transformer for the Carrier PF1MNA071000ACAA. 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 PF1MNA071000ACAA?
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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