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OEM Carrier Furnace Transformer 40VA 120V-24V for PG9MAB024040ABSA
Carrier

OEM Carrier Furnace Transformer 40VA 120V-24V for PG9MAB024040ABSA

SKU: CARRIE-PG9MAB024040ABSA-TRANSFORMER-HT01BC116 Brand: Carrier
✓ Guaranteed to fit PG9MAB024040ABSA — or your money back. Terms

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Texas CMBL #19328542014
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OEM Carrier Furnace Transformer 40VA 120V/24V for Model PG9MAB024040ABSA (Replaces HT01BC116)

This OEM step-down transformer is the factory-specified replacement for the Carrier PG9MAB024040ABSA gas furnace. The transformer is the backbone of the furnace's low-voltage control circuit — it converts 120V line voltage down to 24V AC to power the thermostat, control board, gas valve, and all low-voltage components. When the transformer fails, the furnace goes completely unresponsive: the thermostat loses communication, the inducer never energizes, and no heating cycle can begin. If you're reading 0V between the R and C terminals on your control board, a failed transformer is the first component to test. This listing supplies the current OEM-authorized replacement (supersedes original part number HT01BC116).

  • Specs: 40VA rating | 120V primary input | 24V secondary output | 60 Hz single-phase | Foot-mount bracket | Wire lead connections with insulated female quick-connect terminals | Approx. 3"L × 2-3/16"W × 2"H
  • OEM vs Generic: OEM transformers are wound to factory-exact VA ratings and insulation class, protecting downstream components like the control board and gas valve. Generic units often run at looser VA tolerances, which can cause nuisance tripping, overheating, and premature failure of the low-voltage circuit.
  • Install difficulty: 2/5 — Always shut off power at the breaker and confirm 0V with a multimeter before touching any wiring. Photograph all wire connections before removing the old transformer. Discharge any stored voltage, swap wire leads one at a time to the matching terminals, and secure the foot-mount bracket. Tools needed: flathead and Phillips screwdrivers, 1/4" nut driver, multimeter.
  • Warranty: 1-year OEM manufacturer warranty. In-stock units ship same business day when ordered by 5 PM local time.

Compatibility: Engineered as a direct OEM replacement for Carrier model PG9MAB024040ABSA gas furnaces. Also supersedes legacy part numbers HT01BC116, HT01BC115, HT01BB126, HT01CT120, HT01BC120, HT01AW115, and HT01AA012. Verify your unit's data plate and confirm 120V primary / 24V secondary / 40VA rating before ordering. Have a fitment question? Our HVAC parts team confirms compatibility before you buy — reach out before you order.

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 PG9MAB024040ABSA?
Yes. This is the factory-specified OEM transformer for the Carrier PG9MAB024040ABSA. 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 PG9MAB024040ABSA?
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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