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OEM Carrier Furnace Transformer 120V-24V 40VA — PG8MAA024070ABJA
Carrier

OEM Carrier Furnace Transformer 120V-24V 40VA — PG8MAA024070ABJA

SKU: CARRIE-PG8MAA024070ABJA-TRANSFORMER-HT01BC116 Brand: Carrier
✓ Guaranteed to fit PG8MAA024070ABJA — or your money back. Terms

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Texas CMBL #19328542014
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OEM Carrier Furnace Control Transformer 120V–24V 40VA for Model PG8MAA024070ABJA

This OEM step-down control transformer is the factory-specified replacement for the Carrier PG8MAA024070ABJA gas furnace. Originally sold under part number HT01BC116, this transformer has been superseded by the current OEM part HT680054 — a direct drop-in replacement shipped in Carrier's factory-authorized packaging. The transformer converts 120V line power down to 24V AC, energizing the thermostat circuit, control board logic, gas valve coil, and all other low-voltage components. When it fails, the entire control circuit goes dark: your thermostat will be unresponsive, the furnace will not ignite, and no fault codes will display on the board — because the board itself has no power.

  • Specs: Primary voltage 120V AC | Secondary voltage 24V AC | VA rating: 40VA | Frequency: 60 Hz | Single phase | Foot/chassis mount | Wire lead connections with insulated female quick-connect terminals
  • OEM vs Generic: This is a genuine OEM Carrier replacement. Generic transformers frequently use undersized cores and lower-grade winding insulation that can run hot and fail prematurely — or damage downstream low-voltage components by delivering inconsistent output voltage. OEM is the only safe choice when the control board is also at risk.
  • Install difficulty: 2/5 — Shut off power at the breaker and verify with a non-contact tester before touching any wiring. Label all wire connections and photograph the original wiring before removal. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (verify 24V output after install). Typical job time: 20–30 minutes.
  • Warranty & Shipping: Backed by Carrier's 1-year OEM parts warranty. In stock at NationalHVACParts.com — orders placed before 3 PM local time ship same business day.

Compatibility: Engineered for the Carrier PG8MAA024070ABJA gas furnace. Supersedes OEM part numbers HT01BC116, HT01BC116B, HT01BC115, HT01BB126, HT01CT120, HT01BC120, HT01AW115, and additional legacy Carrier/Bryant/Payne transformer part numbers. Confirm your unit's control voltage is 24V and primary supply is 120V before ordering. Have your model number handy? Our team verifies fitment before you buy — just ask.

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 — PG8MAA024070ABJA?
Yes. This is the factory-specified OEM transformer for the Carrier OEM Carrier Furnace Transformer 120V-24V 40VA — PG8MAA024070ABJA. 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 — PG8MAA024070ABJA?
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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