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OEM Carrier Control Transformer 40VA 120V-24V for PG8MAA048070ABJA
Carrier

OEM Carrier Control Transformer 40VA 120V-24V for PG8MAA048070ABJA

SKU: CARRIE-PG8MAA048070ABJA-TRANSFORMER-HT01BC116 Brand: Carrier
✓ Guaranteed to fit PG8MAA048070ABJA — or your money back. Terms

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Texas CMBL #19328542014
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OEM Carrier Control Transformer 40VA 120V/24V for Model PG8MAA048070ABJA (Replaces HT01BC116)

This OEM control transformer is the factory-specified replacement for the Carrier PG8MAA048070ABJA gas furnace. The transformer steps down 120V line voltage to the 24V signal voltage required to power the control board, thermostat circuit, and all low-voltage safety controls. When the transformer fails, the furnace goes completely unresponsive — the thermostat shows no connection, the control board has no power, and there is zero call-for-heat activity. Replacing this part is often the first diagnostic step when the furnace is completely dead with no error codes displayed.

  • Specs: 40VA rating | 120V primary | 24V secondary | 50/60 Hz single-phase | Compact chassis-mount design | Direct OEM replacement for part number HT01BC116 (superseded by HT680054)
  • OEM vs Generic: OEM transformers are wound to exact Carrier factory tolerances, ensuring stable 24V output under full control-circuit load. Off-brand units often under-deliver VA capacity, causing nuisance lockouts and premature control board failure.
  • Install difficulty: 2/5 — Shut off power at the breaker before starting. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter (to confirm 24V output after install). Label or photograph all low-voltage wiring before disconnecting. Most technicians complete this repair in under 30 minutes.
  • Warranty: 1-year OEM manufacturer warranty. In-stock units ship same business day when ordered before 3 PM local time.

Compatibility: Engineered for the Carrier PG8MAA048070ABJA gas furnace. Also compatible with a broad range of Carrier, Bryant, and Payne furnace models requiring a 40VA 120V-24V step-down transformer. Always verify your unit's data plate voltage and VA requirements before ordering. Our fitment team is available to confirm compatibility — reach out before you order if you have any questions.

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 PG8MAA048070ABJA?
Yes. This is the factory-specified OEM transformer for the Carrier PG8MAA048070ABJA. 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 PG8MAA048070ABJA?
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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