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OEM Carrier Furnace Transformer 40VA 120V-24V — PG8JAA036070ADJA
Carrier

OEM Carrier Furnace Transformer 40VA 120V-24V — PG8JAA036070ADJA

SKU: CARRIE-PG8JAA036070ADJA-TRANSFORMER-HT01BC116 Brand: Carrier
✓ Guaranteed to fit PG8JAA036070ADJA — or your money back. Terms

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Texas CMBL #19328542014
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OEM Carrier 40VA 120V–24V Control Transformer for Model PG8JAA036070ADJA (Part# HT01BC116)

This OEM control transformer is the factory-specified replacement for the Carrier PG8JAA036070ADJA gas furnace. The transformer steps down 120V line voltage to the 24V AC signal that powers your thermostat, gas valve, inducer relay, and control board. When the transformer fails, the entire low-voltage control circuit goes dead — you'll see a completely unresponsive thermostat, no inducer startup, and a furnace that won't attempt ignition at all. Replacing the transformer is one of the fastest repairs in the field and typically restores full system operation in under 30 minutes.

  • Specs: 40VA rating | 120V primary | 24V secondary | 50/60 Hz single-phase | Wire-lead connection type | Compact form factor (approx. 3" L × 2-3/16" W × 2" H)
  • OEM vs Generic: OEM transformers are wound to exact VA and voltage tolerances required by Carrier's control board. Undersized or off-tolerance generic transformers can brownout the control circuit under load, causing intermittent lockouts or premature board failure.
  • Install difficulty: 2/5 — Shut off power at the disconnect and breaker before starting. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to confirm 0V before touching leads). Label or photograph existing wire connections. Swap leads one at a time to avoid miswiring. Restore power only after all connections are secured.
  • Warranty: 1-year OEM manufacturer warranty. In-stock units ship same business day when ordered before 3 PM local time.

Compatibility: Designed for the Carrier PG8JAA036070ADJA gas furnace. OEM part number HT01BC116 has been superseded by Carrier part HT680054, which is the current direct replacement shipped for all HT01BC116 orders. Also cross-references: HT01BC115, HT01BB126, HT01CT120, HT01BC120, HT01AW115, HT01AA012, HT01AQ110, 322666-701, 322953-302, B1810113. Verify your unit's data plate and existing transformer label before ordering. Our team is happy to confirm fitment — 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 OEM Carrier Furnace Transformer 40VA 120V-24V — PG8JAA036070ADJA?
Yes. This is the factory-specified OEM transformer for the Carrier OEM Carrier Furnace Transformer 40VA 120V-24V — PG8JAA036070ADJA. 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 OEM Carrier Furnace Transformer 40VA 120V-24V — PG8JAA036070ADJA?
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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