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OEM Carrier 40VA 120V to 24V Transformer for C48A404062 — Ships Today
Carrier

OEM Carrier 40VA 120V to 24V Transformer for C48A404062 — Ships Today

SKU: CARRIE-C48A404062-TRANSFORMER-HT01BD236 Brand: Carrier

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Texas CMBL #19328542014
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Govt POs Accepted

OEM Carrier 40VA Control Transformer for Model C48A404062

This OEM control transformer is the factory-specified replacement for the Carrier C48A404062 packaged unit. The transformer steps down 120V line voltage to the 24V signal that powers your thermostat, contactor coil, and all low-voltage control circuits. When this component fails, nothing in the system responds — no thermostat display, no fan, no compressor — because the entire control circuit loses power. If your unit is completely unresponsive and your breaker is not tripped, a failed transformer is one of the first components to test.

  • Specs: 40VA rated | 120V primary / 24V secondary | OEM part numbers HT01BD236 and HT01BD702 | Factory-matched output tolerance for reliable low-voltage control
  • OEM vs Generic: OEM transformers are wound and potted to Carrier's exact VA rating and insulation class, ensuring consistent 24V output under load. Generic units can sag under peak demand, causing intermittent control failures and nuisance lockouts.
  • Install difficulty: 2/5 — Disconnect power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Verify 24V output across secondary terminals after installation before restoring full power. Label or photograph all low-voltage wiring before disconnecting.
  • Warranty: 1-year OEM factory warranty. Orders placed before cutoff ship same business day from our warehouse.

Compatibility: Designed for the Carrier C48A404062 packaged unit. Cross-references OEM part numbers HT01BD236 and HT01BD702. Always confirm your unit's control board accepts a 40VA 24V secondary transformer by checking the data plate or wiring diagram inside the access panel before ordering. Our fitment team is available 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 $75
  • 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 C48A404062 — Ships Today?
Yes. This is the factory-specified OEM transformer for the Carrier C48A404062 — Ships Today. 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 C48A404062 — Ships Today?
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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