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OEM Carrier Furnace Transformer 120V-24V 40VA — PG8JAA042090ACJA
Carrier

OEM Carrier Furnace Transformer 120V-24V 40VA — PG8JAA042090ACJA

SKU: CARRIE-PG8JAA042090ACJA-TRANSFORMER-HT01BC116 Brand: Carrier
✓ Guaranteed to fit PG8JAA042090ACJA — or your money back. Terms

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Texas CMBL #19328542014
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OEM Carrier Furnace Transformer 120V–24V 40VA for Model PG8JAA042090ACJA

This OEM step-down transformer is the factory-specified replacement for the Carrier PG8JAA042090ACJA gas furnace. It converts 120V line voltage down to 24V AC to power all low-voltage control circuit components — including the thermostat, gas valve, inducer relay, and control board. When the transformer fails, the entire low-voltage control circuit goes dead: the thermostat display may go blank, the furnace won't respond to any call for heat, and nothing in the system will energize. OEM part number HT01BC116 has been superseded by the current authorized replacement HT680054, which is a drop-in, factory-authorized upgrade shipped in a Carrier factory parts box.

  • Specs: 120V primary | 24V secondary | 40VA rating | 50/60 Hz | Single phase | Foot-mount | Wire lead connections
  • OEM vs Generic: OEM transformers are wound to exact factory VA and voltage tolerances. Generic units can deliver fluctuating secondary voltage that stresses control boards and shortens the life of downstream low-voltage components.
  • Install difficulty: 2/5 — Shut off power at the breaker before starting. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Measure 24V output across the R and C terminals on the control board to confirm the old transformer has failed before replacing. Always photograph all wiring connections before disconnecting leads.
  • Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Direct OEM replacement for Carrier model PG8JAA042090ACJA gas furnace. This part supersedes HT01BC116, HT01BC115, HT01BC120, HT01BB126, and related legacy part numbers. Verify 120V primary and 24V/40VA secondary on your unit's data plate before ordering. Need help confirming fitment? Our HVAC parts specialists will verify compatibility before you buy — order today and get 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 — PG8JAA042090ACJA?
Yes. This is the factory-specified OEM transformer for the Carrier OEM Carrier Furnace Transformer 120V-24V 40VA — PG8JAA042090ACJA. 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 — PG8JAA042090ACJA?
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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