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OEM Carrier Furnace Transformer 40VA 120V-24V for PG9MAA048100ACKA
Carrier

OEM Carrier Furnace Transformer 40VA 120V-24V for PG9MAA048100ACKA

SKU: CARRIE-PG9MAA048100ACKA-TRANSFORMER-HT01BC116 Brand: Carrier
✓ Guaranteed to fit PG9MAA048100ACKA — or your money back. Terms

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Texas CMBL #19328542014
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Govt POs Accepted

OEM Carrier Furnace Control Transformer 40VA 120V/24V for Model PG9MAA048100ACKA

This OEM step-down transformer is the factory-authorized replacement for the Carrier PG9MAA048100ACKA gas furnace, originally referenced under part number HT01BC116 (superseded by HT680054). The transformer converts 120V line voltage down to 24V AC to power the furnace's entire low-voltage control circuit — including the thermostat, gas valve, inducer, and control board. When this component fails, the furnace will appear completely unresponsive: no call for heat, no LED codes, no fan activity — because the 24V control circuit has no power source.

  • Specs: 40VA rating | 120V primary input | 24V secondary output | 60 Hz single-phase | Foot-mount design | Wire lead connections with insulated female quick-connects
  • OEM vs Generic: This OEM unit meets Carrier's exact VA rating and insulation class. Undersized or off-tolerance generic transformers can overheat, trip thermal cutoffs, and damage downstream low-voltage components including the control board.
  • Install difficulty: 2/5 — Shut off power at the breaker and confirm zero voltage with a multimeter before touching any terminals. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Photograph all wiring connections before disconnecting leads. Verify 24V output at R and C terminals on the control board after install.
  • Warranty: 1-year OEM manufacturer warranty. In-stock units ship same business day from our warehouse when ordered before cutoff.

Compatibility: Direct OEM replacement for Carrier model PG9MAA048100ACKA gas furnace. Also supersedes legacy part numbers HT01BC116, HT01BC115, HT01BB126, HT01CT120, HT01BC120, HT01AW115, and HT01AA012. Confirm your unit's original part number on the data plate or wiring diagram before ordering. Need fitment help? Our HVAC parts specialists verify compatibility before your order ships — no guesswork required.

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 PG9MAA048100ACKA?
Yes. This is the factory-specified OEM transformer for the Carrier PG9MAA048100ACKA. 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 PG9MAA048100ACKA?
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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