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OEM Carrier Furnace Transformer 120V/24V 40VA — PG9YAA048080ACSS
Carrier

OEM Carrier Furnace Transformer 120V/24V 40VA — PG9YAA048080ACSS

SKU: CARRIE-PG9YAA048080ACSS-TRANSFORMER-HT01BC117 Brand: Carrier
✓ Guaranteed to fit PG9YAA048080ACSS — or your money back. Terms

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OEM Carrier Furnace Transformer 120V/24V 40VA for Model PG9YAA048080ACSS

This OEM Carrier control transformer (part number HT01BC117, also cross-referenced as HT01BC117A and Basler Electric BE161840GDD) is the factory-specified replacement for the Carrier PG9YAA048080ACSS packaged gas furnace. The transformer steps down 120V line voltage to the 24V AC signal used by the furnace's control board, thermostat circuit, and gas valve. When this part fails, the entire low-voltage control circuit goes dead — the furnace will not respond to thermostat calls, the ignition sequence will not initiate, and no fault codes will display. A failed transformer is often misdiagnosed as a control board failure, making it the smart first-check before replacing more expensive components.

  • Specs: 120V primary | 24V secondary | 40VA rated | Foot-mount configuration | 60Hz | Cross-references: HT01BC117A, BE161840GDD, HT680056 (current supersession)
  • OEM vs Generic: This OEM unit is wound to exact Carrier factory tolerances, ensuring stable 24V output under full load. Generic transformers can sag under peak demand, triggering nuisance lockouts and premature control board failure.
  • Install difficulty: 2/5 — Shut off power at the breaker and verify zero voltage before disconnecting wiring. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or spade connectors. Label all wires before removal. The transformer mounts with two screws and reconnects via quick-disconnect terminals on most applications.
  • Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse when ordered before cutoff.

Compatibility: Confirmed fit for Carrier PG9YAA048080ACSS packaged gas furnace, as well as other PG9YAA and PG9YAB series models. Always verify your unit's data plate shows a 120V/24V 40VA transformer before ordering. Our team is available to confirm fitment — reach out before you buy and we'll verify your part number. Order now for same-day shipping.

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 — PG9YAA048080ACSS?
Yes. This is the factory-specified OEM transformer for the Carrier OEM Carrier Furnace Transformer 120V/24V 40VA — PG9YAA048080ACSS. 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 — PG9YAA048080ACSS?
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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