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 Control Transformer 40VA 120V-24V for PG9MAB048080ABSA
Carrier

OEM Carrier Control Transformer 40VA 120V-24V for PG9MAB048080ABSA

SKU: CARRIE-PG9MAB048080ABSA-TRANSFORMER-HT01BC116 Brand: Carrier
✓ Guaranteed to fit PG9MAB048080ABSA — 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 Control Transformer 40VA 120V-24V for Model PG9MAB048080ABSA

This OEM step-down transformer is the factory-specified replacement for the Carrier PG9MAB048080ABSA gas furnace. It converts 120V line voltage down to 24V AC to power the furnace's entire low-voltage control circuit — including the thermostat, control board, gas valve, and all safety switches. When this transformer fails, the furnace goes completely silent: no thermostat response, no ignition attempt, and no error codes on the control board because the board itself has lost power. If you're reading 0V between the R and C terminals on your control board, this transformer is the first component to test and replace.

  • Specs: 40VA rating | 120V primary (input) | 24V secondary (output) | 60 Hz single-phase | Wire lead connections with insulated female quick-connect terminals | OEM Part# HT01BC116 (superseded by HT680054)
  • OEM vs Generic: This is a genuine OEM Carrier transformer built to exact factory VA and voltage tolerances. Undersized or off-spec generic transformers can overheat, trip internal thermal cutouts, and damage sensitive low-voltage components including the control board and gas valve solenoids.
  • Install difficulty: 2/5 — Shut off 120V power to the furnace at the breaker and verify power is off with a multimeter before touching any wiring. Photograph all wire connections before removal. Tools needed: flathead and Phillips screwdrivers, 1/4" nut driver, multimeter. Reconnect leads to matching terminals and restore power to verify 24V output at R-C.
  • Warranty: 1-year OEM manufacturer warranty. In stock — ships same business day from our warehouse when ordered by 5 PM local time.

Compatibility: Designed for the Carrier PG9MAB048080ABSA gas furnace. This OEM part number HT01BC116 has been officially superseded by HT680054 — both are accepted direct replacements for this model. Verify your existing transformer's primary voltage (120V) and VA rating (40VA) against your unit's data plate before ordering. Need fitment confirmation? Our HVAC parts specialists are ready to verify compatibility 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 PG9MAB048080ABSA?
Yes. This is the factory-specified OEM transformer for the Carrier PG9MAB048080ABSA. 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 PG9MAB048080ABSA?
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