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OEM Carrier Furnace Transformer 120V-24V 40VA — PG8UAA066111ABJA
Carrier

OEM Carrier Furnace Transformer 120V-24V 40VA — PG8UAA066111ABJA

SKU: CARRIE-PG8UAA066111ABJA-TRANSFORMER-HT01BC116 Brand: Carrier
✓ Guaranteed to fit PG8UAA066111ABJA — or your money back. Terms

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OEM Carrier Furnace Control Transformer 120V–24V 40VA for Model PG8UAA066111ABJA

This OEM control transformer is the factory-specified replacement for the Carrier PG8UAA066111ABJA gas furnace, cross-referencing original part number HT01BC116 (superseded by HT680054). The transformer steps down 120V line voltage to the 24V AC signal that powers the entire low-voltage control circuit — including the thermostat, gas valve, inducer relay, and ignition board. When it fails, the furnace goes completely unresponsive: the thermostat calls for heat but nothing happens, or you may notice a blown 3A fuse on the control board as a telltale sign of transformer failure.

  • Specs: Primary voltage: 120 VAC | Secondary voltage: 24 VAC | VA Rating: 40VA | Frequency: 50/60 Hz | Phase: Single | Replaces OEM part HT01BC116 / HT680054
  • OEM vs Generic: This is a genuine OEM Carrier transformer wound to exact factory VA and impedance specifications. Generic aftermarket transformers often run off-tolerance, causing erratic 24V rail voltage, nuisance board faults, and premature control board failure.
  • Install Difficulty: 2/5 — Power down the furnace and verify 0V at the transformer primary before touching any wires. Tools needed: flathead and Phillips screwdrivers, multimeter, needle-nose pliers. Label all wire connections before removal. Check and replace the 3A fuse on the control board if blown — a failed transformer is frequently the cause.
  • Warranty: 1-year OEM manufacturer warranty. In stock and ships same business day from our warehouse.

Compatibility: Fits Carrier model PG8UAA066111ABJA gas furnace. This part also supersedes multiple legacy Carrier/Bryant/Payne transformer part numbers including HT01BC116, HT01BC115, HT01BB126, HT01CT120, HT01BC120, HT01AW115, and HT01AA012. Always verify primary voltage (120V) and VA rating (40VA) on your unit's data plate before ordering. Have a fitment question? Our HVAC parts specialists verify 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 OEM Carrier Furnace Transformer 120V-24V 40VA — PG8UAA066111ABJA?
Yes. This is the factory-specified OEM transformer for the Carrier OEM Carrier Furnace Transformer 120V-24V 40VA — PG8UAA066111ABJA. 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 OEM Carrier Furnace Transformer 120V-24V 40VA — PG8UAA066111ABJA?
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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