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OEM Carrier Furnace Transformer 120V-24V 40VA for PG9MAA048100AFKA
Carrier

OEM Carrier Furnace Transformer 120V-24V 40VA for PG9MAA048100AFKA

SKU: CARRIE-PG9MAA048100AFKA-TRANSFORMER-HT01BC116 Brand: Carrier
✓ Guaranteed to fit PG9MAA048100AFKA — or your money back. Terms

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OEM Carrier Furnace Transformer 120V–24V 40VA for Model PG9MAA048100AFKA (Part# HT01BC116 / HT680054)

This is the OEM factory-specified step-down control transformer for the Carrier PG9MAA048100AFKA gas furnace. The transformer converts 120V line voltage to the 24V AC signal that powers every low-voltage component in your system — thermostat, gas valve, inducer relay, and control board. When this transformer fails, the furnace goes completely silent: the thermostat shows no response, the board has no power, and nothing turns on. It is one of the most commonly overlooked root causes of a total no-heat call. OEM part number HT01BC116 has been superseded by the current factory-authorized replacement, HT680054, which ships in a Carrier-branded box and is a direct drop-in swap.

  • Specs: Primary Voltage: 120 VAC | Secondary Voltage: 24 VAC | VA Rating: 40VA | Frequency: 50/60 Hz | Phase: Single | Dimensions: 3" L × 2-2/16" W × 2" H | Foot-mount configuration | Wire lead connections
  • OEM vs Generic: This OEM transformer is wound and tested to Carrier's exact VA and voltage-drop tolerances. Generic transformers often run high secondary voltage at light load, which can damage sensitive control boards and shorten thermostat life. OEM is always the correct choice for PG9MAA-series furnaces.
  • Install difficulty: 2/5 — Shut off power at the breaker and confirm zero voltage before touching any wiring. Tools needed: flathead and Phillips screwdriver, 1/4" nut driver, multimeter. Always label or photograph all wire connections before removal. Verify 24V output across R and C terminals after installation to confirm function before closing the cabinet.
  • Warranty: 1-year OEM manufacturer's warranty. In-stock and ships same business day when ordered by cutoff time.

Compatibility: Designed for the Carrier PG9MAA048100AFKA gas furnace. Also replaces legacy part numbers HT01BC115, HT01BB126, HT01CT120, HT01BC120, HT01AW115, HT01AA012, HT01AQ110, HT01CT210, 322666-701, 322953-302, and B1810113 across Carrier, Bryant, and Payne furnace platforms. Always confirm primary/secondary voltage and VA rating on your unit's data plate before ordering. Need fitment verification? Our HVAC parts team confirms compatibility before you buy — reach out before placing your 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 PG9MAA048100AFKA?
Yes. This is the factory-specified OEM transformer for the Carrier PG9MAA048100AFKA. 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 PG9MAA048100AFKA?
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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