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OEM Carrier Furnace Transformer 120V–24V 40VA for PG8MAA048090ABJA
Carrier

OEM Carrier Furnace Transformer 120V–24V 40VA for PG8MAA048090ABJA

SKU: CARRIE-PG8MAA048090ABJA-TRANSFORMER-HT01BC116 Brand: Carrier
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OEM Carrier Furnace Control Transformer 120V–24V 40VA — HT01BC116 / HT680054 for Model PG8MAA048090ABJA

This OEM Carrier control transformer is the factory-specified replacement for the Carrier PG8MAA048090ABJA gas furnace. The transformer steps down 120V line voltage to 24V AC, powering the low-voltage control circuit that operates your thermostat, gas valve, inducer, and all safety switches. When the transformer fails, the entire control circuit goes dead — your furnace will not respond to the thermostat, and no heating sequence will initiate. Note: OEM part number HT01BC116 has been superseded by HT680054, which is the current factory-authorized drop-in replacement shipped in a Carrier factory parts box.

  • Specs: Primary Voltage: 120V AC | Secondary Voltage: 24V AC | VA Rating: 40VA | Frequency: 60 Hz | Phase: Single | Mounting: Foot-mount bracket
  • OEM vs Generic: OEM transformers are wound to exact factory VA and voltage tolerances, protecting downstream components like the control board and gas valve. Generic units often run outside rated output voltage, risking nuisance lockouts or premature board failure.
  • Install Difficulty: 2/5 — Shut off power at the disconnect before starting. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Label all low-voltage wire connections before removing the old unit. Check for a blown inline fuse on the secondary side before condemning the transformer.
  • Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse when ordered before cutoff.

Compatibility: Designed for the Carrier PG8MAA048090ABJA 80% AFUE gas furnace. Superseded part HT680054 also replaces cross-references HT01BC115, HT01BC120, HT01BB126, HT01CT120, and HT01AW115. Verify primary voltage (120V) on your unit's data plate before ordering. Have questions about fitment? Our HVAC parts specialists confirm compatibility before you buy — order with confidence and ships today.

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 PG8MAA048090ABJA?
Yes. This is the factory-specified OEM transformer for the Carrier PG8MAA048090ABJA. 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 PG8MAA048090ABJA?
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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