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OEM Carrier Furnace Transformer 120V–24V 40VA for PG9MAA048100ABKA
Carrier

OEM Carrier Furnace Transformer 120V–24V 40VA for PG9MAA048100ABKA

SKU: CARRIE-PG9MAA048100ABKA-TRANSFORMER-HT01BC116 Brand: Carrier
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OEM Carrier Furnace Control Transformer 120V–24V 40VA for Model PG9MAA048100ABKA

This is the OEM factory-specified control transformer for the Carrier PG9MAA048100ABKA gas furnace. The transformer steps down the 120V line voltage to the 24V AC signal that powers every low-voltage component in the system — thermostat, gas valve, inducer relay, and control board. When the transformer fails, the entire control circuit goes dead: the thermostat goes blank, the furnace will not respond to a call for heat, and no status codes are displayed on the board. Note: OEM part number HT01BC116 has been superseded by the current factory replacement HT680054 — a direct drop-in with identical specifications.

  • Specs: Primary voltage: 120V AC | Secondary voltage: 24V AC | VA rating: 40VA | Frequency: 60Hz | Mounting type: Foot mount | Connection type: Wire leads with insulated female connectors
  • OEM vs Generic: OEM transformers are wound to exact factory tolerances, delivering a stable 24V output under load. Generic units frequently produce low or fluctuating output voltage, causing nuisance lockouts, erratic thermostat behavior, and premature control board failure.
  • Install difficulty: 2/5 — Shut off power at the disconnect and breaker before starting. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (verify 0V before touching wiring). Photograph all wiring connections before removal. Confirm 24V output at C and R terminals on the control board after installation.
  • Warranty: 1-year OEM factory warranty against defects. Ships same business day from our warehouse when ordered before cutoff.

Compatibility: Engineered for the Carrier PG9MAA048100ABKA gas furnace. This OEM replacement also cross-references part numbers HT01BC116, HT01BC116B, HT01BC115, HT01BB126, HT01CT120, HT01BC120, and several additional legacy numbers — making it one of the most widely applicable Carrier/Bryant/Payne furnace transformers available. Verify your data plate voltage rating before ordering. Our fitment team is available to 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 PG9MAA048100ABKA?
Yes. This is the factory-specified OEM transformer for the Carrier PG9MAA048100ABKA. 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 PG9MAA048100ABKA?
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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