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OEM Carrier Transformer 120V–24V 40VA for PG9MAA060140AFKA
Carrier

OEM Carrier Transformer 120V–24V 40VA for PG9MAA060140AFKA

SKU: CARRIE-PG9MAA060140AFKA-TRANSFORMER-HT01BC116 Brand: Carrier
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OEM Carrier Control Transformer 120V–24V 40VA for Model PG9MAA060140AFKA (HT01BC116 / HT680054)

This OEM control transformer is the factory-specified replacement for the Carrier PG9MAA060140AFKA gas furnace. The transformer steps down 120V line voltage to 24V AC, powering every low-voltage control circuit in the system — including the thermostat, gas valve, control board, and inducer relay. When this part fails, the entire control circuit goes dark: your thermostat displays nothing, the furnace won't respond to calls for heat, and no diagnostic fault codes will appear because the board itself has no power.

  • Specs: Input 120V AC | Output 24V AC | 40VA rating | Foot-mount configuration | Wire-lead connections | 60 Hz | Includes 3A inline fuse protection
  • OEM vs Generic: OEM transformers are wound to exact Carrier factory VA tolerances, ensuring stable 24V output under full load. Undersized generic units can sag voltage, causing erratic board behavior, nuisance lockouts, or premature control board failure — as confirmed by field technicians.
  • Install difficulty: 2/5 — Shut off power at the breaker and verify zero voltage before disconnecting. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or spade connectors. Photograph existing wiring before removal. Check C and R terminals on the control board for 24V output after installation to confirm proper operation.
  • Warranty & Shipping: 1-year OEM factory warranty. In stock — ships same business day from our warehouse.

Compatibility & Supersession Note: Originally sold as HT01BC116; the current OEM replacement part number is HT680054, which ships in an official Carrier/Bryant factory-authorized parts box and is a direct drop-in. Also replaces HT01BC115, HT01BC120, HT01BB126, HT01CT120, and several additional legacy part numbers. Verify 120V primary input and 24V/40VA output on your unit's wiring diagram before ordering. Questions about fitment? Our HVAC specialists confirm compatibility before you buy.

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 PG9MAA060140AFKA?
Yes. This is the factory-specified OEM transformer for the Carrier PG9MAA060140AFKA. 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 PG9MAA060140AFKA?
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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