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OEM Carrier 40VA Transformer 120V–24V for PG8MAA048135ADJA | HT01BC116
Carrier

OEM Carrier 40VA Transformer 120V–24V for PG8MAA048135ADJA | HT01BC116

SKU: CARRIE-PG8MAA048135ADJA-TRANSFORMER-HT01BC116 Brand: Carrier
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Texas CMBL #19328542014
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OEM Carrier 40VA Transformer 120V–24V for Model PG8MAA048135ADJA (HT01BC116)

This OEM control circuit transformer is the factory-specified replacement for the Carrier PG8MAA048135ADJA gas furnace. The transformer steps down 120V line voltage to 24V AC, powering the thermostat, gas valve, inducer relay, and all low-voltage control components. When this part fails, the entire control circuit goes dead — your thermostat display may go blank, the furnace won't respond to any call for heat, and no status codes will appear on the control board. Also sold under updated successor part number HT680054.

  • Specs: 40VA rating | Primary: 120V AC | Secondary: 24V AC | 60 Hz | Foot-mount configuration | Wire lead connections with pre-installed insulated connectors
  • OEM vs Generic: OEM transformers are wound to exact VA and voltage tolerances, protecting sensitive downstream components like gas valves and control boards. Generic units often run off-spec voltage, risking nuisance lockouts or damage to low-voltage circuits over time.
  • Install difficulty: 2/5 — Shut off power at the breaker before beginning. Tools needed: flathead and Phillips screwdriver, needle-nose pliers, multimeter. Label or photograph all wire connections before removal. Discharge any residual voltage before reconnecting leads.
  • Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse.

Compatibility: Direct OEM replacement for Carrier model PG8MAA048135ADJA gas furnace. Also replaces part numbers HT01BC116B, HT01BC115, HT01BC120, HT01BB126, HT01CT120, HT680054, and several additional cross-references. Verify your unit's data plate voltage and VA rating before ordering. Our fitment team is available to confirm compatibility prior to purchase — order with confidence and ship 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 PG8MAA048135ADJA | HT01BC116?
Yes. This is the factory-specified OEM transformer for the Carrier PG8MAA048135ADJA | HT01BC116. 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 PG8MAA048135ADJA | HT01BC116?
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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