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OEM Carrier Furnace Transformer 120V-24V 40VA for PG8MAA048135ABJA
Carrier

OEM Carrier Furnace Transformer 120V-24V 40VA for PG8MAA048135ABJA

SKU: CARRIE-PG8MAA048135ABJA-TRANSFORMER-HT01BC116 Brand: Carrier
✓ Guaranteed to fit PG8MAA048135ABJA — 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 PG8MAA048135ABJA

This OEM step-down transformer is the factory-specified control circuit transformer for the Carrier PG8MAA048135ABJA gas furnace. It converts 120V line voltage to the 24V AC signal that powers your thermostat, gas valve, control board, and all low-voltage components. When the transformer fails, the entire control circuit goes dead — the furnace will not respond to any thermostat call, and nothing will happen on a call for heat or cooling. A failed transformer is often identified by checking for 24V between the R and C terminals on the control board; a reading of 0V with line power confirmed is a clear sign of transformer failure.

  • Specs: Input: 120V AC | Output: 24V AC | VA Rating: 40VA | Mounting: Foot mount | Connection: Wire leads | Frequency: 60 Hz
  • OEM vs Generic: This is a genuine OEM Carrier replacement (current superseding part number HT680054), supplied in a factory-authorized parts box. Generic transformers often have imprecise VA ratings and ill-fitting mounting tabs — one customer noted a generic unit required modification to mount correctly. OEM guarantees a direct drop-in fit and proper output voltage under load.
  • Install difficulty: 2/5 — Shut off power to the furnace at the breaker and disconnect the 120V feed before touching any wiring. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to confirm 0V before touching terminals and verify 24V output after installation). Photograph all wire connections before disconnecting.
  • Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse.

Compatibility: Direct OEM replacement for Carrier model PG8MAA048135ABJA gas furnaces. OEM part number HT01BC116 has been superseded by HT680054 — both are the same factory-spec 120V–24V 40VA transformer. Also cross-references: HT01BC115, HT01BC120, HT01BB126, B1810113, and 322666-701. Verify your existing transformer's input voltage, output voltage, and VA rating against your unit's data plate before ordering. Need fitment confirmation? Our team is happy to verify compatibility before you buy — order today and receive 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 PG8MAA048135ABJA?
Yes. This is the factory-specified OEM transformer for the Carrier PG8MAA048135ABJA. 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 PG8MAA048135ABJA?
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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