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OEM Carrier Transformer 120V–24V 40VA HT01BC116 — PG8MAA024045AAJA
Carrier

OEM Carrier Transformer 120V–24V 40VA HT01BC116 — PG8MAA024045AAJA

SKU: CARRIE-PG8MAA024045AAJA-TRANSFORMER-HT01BC116 Brand: Carrier
✓ Guaranteed to fit PG8MAA024045AAJA — or your money back. Terms

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Texas CMBL #19328542014
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OEM Carrier Control Transformer 120V–24V 40VA (HT01BC116) for Model PG8MAA024045AAJA

This OEM step-down control transformer is the factory-specified replacement for the Carrier PG8MAA024045AAJA gas furnace. The transformer converts 120V line voltage to 24V AC, powering the low-voltage control circuit that drives the thermostat, gas valve, control board, and all safety switching. When this transformer fails, the entire control circuit goes dead — you'll see a blank thermostat, no system response to a call for heat, or a furnace that won't attempt ignition at all. A shorted transformer may also blow the 3A control fuse repeatedly.

  • Specs: Input: 120V AC | Output: 24V AC | Capacity: 40VA | Foot-mount configuration | Wire-lead connections | Factory tolerance-matched for Carrier furnace control boards
  • OEM vs Generic: OEM transformers maintain precise 24V output under full VA load, protecting downstream components like the control board and gas valve. Generic units often sag under load, causing erratic thermostat behavior and nuisance lockouts.
  • Install difficulty: 2/5 — Disconnect power at the breaker and verify zero voltage before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Label all wire leads before disconnecting. Check C and R terminals on the control board for 24V output to confirm successful installation.
  • Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Fits Carrier model PG8MAA024045AAJA gas furnaces. OEM part number HT01BC116 has been superseded by the current production part HT680054 — both are covered by this listing. Also cross-references HT01BC115, HT01BB126, HT01CT120, and HT01BC120. Verify input/output voltage and VA rating on your unit's data plate before ordering. Need fitment confirmation? Our team checks 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 Transformer 120V–24V 40VA HT01BC116 — PG8MAA024045AAJA?
Yes. This is the factory-specified OEM transformer for the Carrier OEM Carrier Transformer 120V–24V 40VA HT01BC116 — PG8MAA024045AAJA. 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 Transformer 120V–24V 40VA HT01BC116 — PG8MAA024045AAJA?
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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