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OEM Carrier Furnace Transformer 40VA 120V-24V for PG9MAB024060ACSA
Carrier

OEM Carrier Furnace Transformer 40VA 120V-24V for PG9MAB024060ACSA

SKU: CARRIE-PG9MAB024060ACSA-TRANSFORMER-HT01BC116 Brand: Carrier
✓ Guaranteed to fit PG9MAB024060ACSA — or your money back. Terms

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OEM Carrier Furnace Transformer 40VA 120V/24V — Model PG9MAB024060ACSA (HT01BC116 / HT680054)

This is the factory-specified OEM step-down transformer for the Carrier PG9MAB024060ACSA gas furnace. The transformer converts 120V line voltage down to 24V AC to power all low-voltage control circuit components — including the thermostat, gas valve, inducer relay, and control board. When this transformer fails, the result is total loss of low-voltage power: a blank thermostat display, no response to any call for heat, and a furnace that appears completely dead despite line voltage being present. A failed transformer can also be caused by a downstream short circuit in the 24V wiring, so always inspect low-voltage wiring before installing the replacement.

  • Specs: 40VA rating | 120V primary input | 24V secondary output | 50/60 Hz single-phase | Foot-mount configuration | Wire lead connections with insulated female quick-connects
  • OEM vs Generic: This OEM unit is wound to factory-exact VA and voltage tolerances. Generic transformers often run outside ±5% tolerance, which can starve sensitive control boards of proper voltage and cause nuisance lockouts or premature board failure.
  • Install difficulty: 2/5 — Shut off power at the disconnect and breaker before starting. Tools needed: flathead and Phillips screwdriver, needle-nose pliers, multimeter. Before disconnecting wires, photograph or label all lead connections. After installation, verify 24V output between the R and C terminals on the control board before restoring full power.
  • Warranty & Shipping: 1-year OEM manufacturer warranty. In stock — ships same business day from our warehouse when ordered by 3 PM local time.

Compatibility & Part Number Note: OEM part number HT01BC116 has been superseded by HT680054 — the current factory-authorized replacement shipped in a Carrier factory parts box. This listing fulfills orders originally placed under HT01BC116. Fits Carrier PG9MAB024060ACSA and other Carrier, Bryant, and Payne furnace models using a 40VA 120V/24V transformer. Verify your existing transformer's VA and voltage ratings on its label before ordering. Questions about fitment? Our HVAC parts team confirms compatibility before you buy — reach out anytime.

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 PG9MAB024060ACSA?
Yes. This is the factory-specified OEM transformer for the Carrier PG9MAB024060ACSA. 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 PG9MAB024060ACSA?
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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