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OEM Carrier Furnace Transformer 40VA 120-24V for PG8JEB066110AAJA
Carrier

OEM Carrier Furnace Transformer 40VA 120-24V for PG8JEB066110AAJA

SKU: CARRIE-PG8JEB066110AAJA-TRANSFORMER-322666-701 Brand: Carrier
✓ Guaranteed to fit PG8JEB066110AAJA — or your money back. Terms

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Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

OEM Carrier Furnace Transformer 40VA 120V/24V — Part 322666-701 for Model PG8JEB066110AAJA

This OEM step-down control transformer is the factory-specified replacement for the Carrier PG8JEB066110AAJA gas furnace. It converts 120V line voltage to the 24V signal that powers your thermostat circuit, control board, gas valve, and every other low-voltage component in the system. When this transformer fails, the entire control circuit goes dark — your furnace will not respond to the thermostat, the board will not sequence, and you will have a complete no-heat condition. It is one of the first components a technician checks on a dead-board call.

  • Specs: 40VA capacity | 120V primary | 24V secondary | 60Hz | OEM part number 322666-701 | Superseded by Carrier HT680054 (same specs, direct fit)
  • OEM vs Generic: OEM transformers are wound to exact factory VA and voltage tolerances. Undersized or off-tolerance aftermarket units can cause nuisance low-voltage faults, board brownouts, or premature contactor coil failure.
  • Install difficulty: 2/5 — Shut off power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (verify 0V before touching wiring). Label all wire connections before removal. Total job time: 20–30 minutes.
  • Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier PG8JEB066110AAJA gas furnace. If your unit's data plate lists OEM part 322666-701, this is your direct replacement. Not sure? Our parts team verifies fitment before you order — reach out and we'll confirm. Order now and get same-day shipping on in-stock parts.

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 PG8JEB066110AAJA?
Yes. This is the factory-specified OEM transformer for the Carrier PG8JEB066110AAJA. 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 PG8JEB066110AAJA?
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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