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 40VA Transformer 120V-24V for PG8JAA066110AAJA
Carrier

OEM Carrier 40VA Transformer 120V-24V for PG8JAA066110AAJA

SKU: CARRIE-PG8JAA066110AAJA-TRANSFORMER-HT01BC116 Brand: Carrier
✓ Guaranteed to fit PG8JAA066110AAJA — 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 40VA Control Transformer 120V–24V for Model PG8JAA066110AAJA

This OEM control transformer is the factory-specified replacement for the Carrier PG8JAA066110AAJA gas furnace. The transformer steps down 120V AC line voltage to 24V AC, powering the furnace's entire low-voltage control circuit — including the thermostat, gas valve, inducer relay, and control board. When the transformer fails, the result is total loss of control: a blank thermostat display, no ignition attempt, and a furnace that appears completely dead. A blown internal fuse or shorted low-voltage wiring are the most common causes of transformer failure.

  • Specs: 40VA rating | 120V AC primary input | 24V AC secondary output | 60 Hz | Foot-mount configuration | OEM part number HT01BC116 (superseded by HT680054)
  • OEM vs Generic: This OEM unit is manufactured to exact Carrier factory tolerances and includes proper foot-mount geometry for a clean, no-modification installation. Generic transformers frequently have mounting mismatches and inconsistent VA ratings that can damage sensitive control boards.
  • Install difficulty: 2/5 — Always disconnect power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter (to confirm 24V output before re-energizing). Photograph all wiring connections prior to removal. Check low-voltage wiring for shorts before installing — a shorted wire will blow the new transformer immediately.
  • Warranty: 1-year OEM factory warranty against defects. Ships same business day from our warehouse.

Compatibility: Engineered as a direct OEM replacement for the Carrier PG8JAA066110AAJA gas furnace. Cross-references include HT01BC116, HT01BC116B, HT01BC115, HT680054, and HT01BC120. Verify your unit's control circuit voltage (24V) and VA demand on the rating plate before ordering. Need fitment confirmation? Our HVAC parts specialists verify compatibility before you buy — order now and ship today.

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 PG8JAA066110AAJA?
Yes. This is the factory-specified OEM transformer for the Carrier PG8JAA066110AAJA. 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 PG8JAA066110AAJA?
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