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OEM Carrier Furnace Transformer 40VA 120V-24V for PG9MAA036040AFKA
Carrier

OEM Carrier Furnace Transformer 40VA 120V-24V for PG9MAA036040AFKA

SKU: CARRIE-PG9MAA036040AFKA-TRANSFORMER-HT01BC116 Brand: Carrier
✓ Guaranteed to fit PG9MAA036040AFKA — or your money back. Terms

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Texas CMBL #19328542014
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OEM Carrier Furnace Transformer 40VA 120V-24V for Model PG9MAA036040AFKA

This OEM step-down transformer is the factory-authorized replacement for the Carrier PG9MAA036040AFKA gas furnace. The transformer converts 120V line voltage to the 24V AC signal that powers every low-voltage component in your system — thermostat, gas valve, control board relays, and zone controllers. When the transformer fails, the entire control circuit goes dark: your thermostat goes blank, the furnace won't respond to any call for heat, and you may measure zero voltage between the R and C terminals on the control board. Replacing it is one of the most cost-effective furnace repairs you can make.

  • Specs: 40VA rating | 120V primary / 24V secondary | 60 Hz single-phase | Foot-mount configuration | Wire lead connections with insulated female quick-connects | Dimensions approx. 3″ L × 2-3/16″ W × 2″ H
  • OEM vs Generic: This is a genuine OEM Carrier replacement (supersedes legacy part number HT01BC116 → current OEM part HT680054), supplied in factory-authorized packaging. Generic transformers frequently use undersized copper windings and run warmer under load, increasing the risk of premature failure and nuisance tripping of your furnace's limit circuit.
  • Install difficulty: 2/5 — Shut off power at the disconnect and verify zero volts before touching any wiring. Photograph all wire connections before removal. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Verify 24V output across R and C terminals after installation before closing the unit.
  • Warranty: 1-year OEM manufacturer warranty. Ships same business day from our warehouse when ordered by 5 PM local time.

Compatibility: Designed for the Carrier PG9MAA036040AFKA gas furnace. This transformer also carries crossover coverage for multiple Carrier, Bryant, and Payne furnace models — confirm your unit's data plate shows 120V primary / 24V secondary / 40VA before ordering. Not sure it fits? Our parts team verifies fitment at no charge 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 PG9MAA036040AFKA?
Yes. This is the factory-specified OEM transformer for the Carrier PG9MAA036040AFKA. 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 PG9MAA036040AFKA?
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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