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OEM Carrier Furnace Transformer 40VA 120V-24V for PG9MAA024040AFKA
Carrier

OEM Carrier Furnace Transformer 40VA 120V-24V for PG9MAA024040AFKA

SKU: CARRIE-PG9MAA024040AFKA-TRANSFORMER-HT01BC116 Brand: Carrier
✓ Guaranteed to fit PG9MAA024040AFKA — or your money back. Terms

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Texas CMBL #19328542014
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Govt POs Accepted

OEM Carrier Control Transformer 40VA 120V–24V for Model PG9MAA024040AFKA (Replaces HT01BC116)

This OEM step-down control transformer is the factory-specified replacement for the Carrier PG9MAA024040AFKA gas furnace. The transformer converts 120V line voltage down to the 24V signal voltage that powers your thermostat, control board, gas valve, and all low-voltage control circuits. When it fails, the furnace goes completely silent — no ignition attempt, no thermostat response, no fan activity. If your 24V fuse keeps blowing or your system is completely unresponsive, a failed transformer is one of the first components to test.

  • Specs: 40VA capacity | 120V primary / 24V secondary | 50/60 Hz single-phase | Wire lead connections | Replaces OEM part number HT01BC116 (superseded by HT680054)
  • OEM vs Generic: This OEM unit is wound to Carrier's exact VA and impedance tolerances. Generic transformers frequently run under-rated, causing nuisance fuse failures and erratic thermostat behavior — especially in variable-speed or two-stage furnace control circuits.
  • Install difficulty: 2/5 — Turn off all power at the breaker before starting. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to verify 24V output post-install). Photograph wiring connections before removal. Note: discharge any residual voltage before handling terminals.
  • Warranty: 1-year OEM manufacturer warranty. In-stock units ship the same business day from our warehouse.

Compatibility: Engineered as a direct OEM drop-in replacement for Carrier model PG9MAA024040AFKA gas furnaces. Also replaces legacy part numbers HT01BC116, HT01BC115, HT01BB126, HT01CT120, and several other Carrier/Bryant/Payne transformer variants — verify primary voltage (120V) and VA rating (40VA) against your unit's data plate before ordering. Order before 5 PM and your part ships 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 PG9MAA024040AFKA?
Yes. This is the factory-specified OEM transformer for the Carrier PG9MAA024040AFKA. 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 PG9MAA024040AFKA?
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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