Same-day shipping before 3PM CST · 35,000+ OEM Parts · Texas CMBL & SAM.gov Registered · Government POs Accepted

Menu

Home Shop All Account Cart
OEM Carrier Transformer 40VA 120V/24V for N6A48NG481881
Carrier

OEM Carrier Transformer 40VA 120V/24V for N6A48NG481881

SKU: CARRIE-N6A48NG481881-TRANSFORMER-HT01BC116 Brand: Carrier
✓ Guaranteed to fit N6A48NG481881 — or your money back. Terms

OEM Guaranteed

Same-Day Ship

30-Day Returns

Secure Checkout

Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

OEM Carrier Transformer 40VA 120V to 24V for Model N6A48NG481881

This OEM step-down transformer (part number HT01BC116) is the factory-specified replacement for the Carrier N6A48NG481881 packaged unit. The transformer converts 120V line voltage to the 24V signal required to power the control board, thermostat circuit, and all low-voltage components. When this part fails, the entire control circuit goes dead — your thermostat loses communication, the system won't respond to calls for heating or cooling, and no error codes can even be generated. If you're getting 120V at the transformer primary but zero output on the secondary, this is your part.

  • Specs: Input 120VAC | Output 24VAC | 40VA rating | OEM part number HT01BC116 | Factory-matched output tolerance for stable low-voltage control
  • OEM vs Generic: OEM transformers are wound to exact VA and voltage specifications for the Carrier N6A48NG481881 control circuit. Undersized or off-tolerance generic units can cause erratic thermostat behavior, nuisance tripping of the 3-amp fuse, or premature control board failure.
  • Install difficulty: 2/5 — Disconnect power at the disconnect block before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Label or photograph all low-voltage wiring connections before removal. Verify 120V input and 24V output with a multimeter after installation.
  • Warranty: 1-year OEM factory warranty included. Orders placed before cutoff ship same business day from our climate-controlled warehouse.

Compatibility: Engineered for the Carrier N6A48NG481881 packaged gas/electric unit. Confirm OEM part number HT01BC116 on your existing transformer label before ordering. Not sure it's the right fit? Our HVAC parts specialists verify fitment before every order — reach out before you buy.

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 N6A48NG481881?
Yes. This is the factory-specified OEM transformer for the Carrier N6A48NG481881. 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 N6A48NG481881?
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.
Home Shop Search Account Cart
Fitment Guaranteed
MR
Mike Rivera
HVAC Parts Specialist — Online