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OEM Carrier Furnace Transformer 40VA 120V-24V — PG8UAA024045ABJA
Carrier

OEM Carrier Furnace Transformer 40VA 120V-24V — PG8UAA024045ABJA

SKU: CARRIE-PG8UAA024045ABJA-TRANSFORMER-HT01BC116 Brand: Carrier
✓ Guaranteed to fit PG8UAA024045ABJA — or your money back. Terms

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Texas CMBL #19328542014
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OEM Carrier 40VA Control Transformer 120V/24V for Model PG8UAA024045ABJA (Replaces HT01BC116)

This OEM Carrier control transformer is the factory-specified replacement for the Carrier PG8UAA024045ABJA gas furnace. The transformer steps down 120V line voltage to the 24V AC signal that powers your thermostat, control board, gas valve, and all low-voltage control circuits. When this component fails, the furnace loses all communication with the thermostat — resulting in a completely unresponsive system, blown low-voltage fuse, or a furnace that won't call for heat at all. Replacing it is one of the most cost-effective repairs in HVAC service.

  • Specs: 40VA rating | 120V primary voltage | 24V secondary voltage | 50/60 Hz single-phase | OEM part HT01BC116 (superseded by HT680054)
  • OEM vs Generic: OEM transformers are wound and rated to exact factory tolerances, ensuring stable 24V output under full control-circuit load. Generic units can output unregulated voltage that stresses the control board and gas valve coil over time.
  • Install Difficulty: 2/5 — Shut off power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Label all 24V wires before disconnecting. Verify secondary output voltage after installation before restoring full power.
  • Warranty: 1-year OEM manufacturer warranty. In stock — ships same business day from our warehouse when ordered by 3 PM local time.

Compatibility: Fits Carrier model PG8UAA024045ABJA gas furnace. OEM part number HT01BC116 has been superseded by HT680054 — both are fulfilled as the current OEM replacement. Also cross-references: HT01BC115, HT01BB126, HT01CT120, HT01BC120. Verify primary voltage (120V) on your unit's data plate before ordering. Not sure it fits? Our fitment team will confirm compatibility before you check out.

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 40VA 120V-24V — PG8UAA024045ABJA?
Yes. This is the factory-specified OEM transformer for the Carrier OEM Carrier Furnace Transformer 40VA 120V-24V — PG8UAA024045ABJA. 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 40VA 120V-24V — PG8UAA024045ABJA?
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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