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OEM Carrier Furnace Transformer 120V-24V 40VA — HT01BC116 / PG9MAA0360
Carrier

OEM Carrier Furnace Transformer 120V-24V 40VA — HT01BC116 / PG9MAA0360

SKU: CARRIE-PG9MAA036040AEKA-TRANSFORMER-HT01BC116 Brand: Carrier
✓ Guaranteed to fit PG9MAA0360 — or your money back. Terms

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OEM Carrier Furnace Control Transformer 120V–24V 40VA for Model PG9MAA036040AEKA (HT01BC116 / HT680054)

This is the OEM factory-specified step-down control transformer for the Carrier PG9MAA036040AEKA gas furnace. The transformer converts 120V line voltage to 24V AC, powering every low-voltage control component in your system — the thermostat, control board, gas valve, and zone controls. When this transformer fails, the entire control circuit goes dead: you may see a blank thermostat display, no furnace response whatsoever, or a tripped 3A fuse on the board. Note: OEM part number HT01BC116 has been superseded by HT680054 — this is the current, factory-authorized replacement and is a direct drop-in with no modifications required.

  • Specs: Primary voltage: 120V AC | Secondary voltage: 24V AC | VA rating: 40VA | Frequency: 50/60 Hz | Phase: Single | Mounting type: Foot mount with wire leads
  • OEM vs Generic: OEM transformers from Carrier are wound to exact VA and voltage tolerances. Undersized or off-tolerance generic units can cause nuisance tripping, control board damage, or premature fuse failure — a risk not worth taking on a furnace control circuit.
  • Install difficulty: 2/5 — Turn off power at the breaker and confirm 0V before touching any wiring. Photograph all wire connections before removal. Tools needed: flathead and Phillips screwdrivers, multimeter, needle-nose pliers. Check and replace the 3A low-voltage fuse on the control board if the original transformer failed due to a short.
  • Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier PG9MAA036040AEKA gas furnace. This OEM part (HT01BC116, superseded by HT680054) also fits a wide range of Carrier, Bryant, and Payne furnace models sharing the 120V–24V 40VA transformer specification. Verify your existing transformer's primary/secondary voltage and VA rating against your unit's data plate before ordering. Have questions about fitment? Our HVAC parts team confirms compatibility before you buy — order with confidence and get it shipped 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 OEM Carrier Furnace Transformer 120V-24V 40VA — HT01BC116 / PG9MAA0360?
Yes. This is the factory-specified OEM transformer for the Carrier OEM Carrier Furnace Transformer 120V-24V 40VA — HT01BC116 / PG9MAA0360. 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 — HT01BC116 / PG9MAA0360?
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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