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OEM Carrier Transformer 40VA 120V to 24V for C48A403562 — Ships Today
Carrier

OEM Carrier Transformer 40VA 120V to 24V for C48A403562 — Ships Today

SKU: CARRIE-C48A403562-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 C48A403562

This OEM control transformer is the factory-specified replacement for the Carrier C48A403562 packaged unit. The transformer steps down 120V line voltage to 24V to power the entire control circuit — including the thermostat, contactor coil, and control board. When it fails, the thermostat goes blank, the system becomes completely unresponsive, or a downstream short may have burned out the secondary winding. Replaces OEM part numbers HT01BD236 and HT01BD702.

  • Specs: 40VA rating | Primary: 120V | Secondary: 24V | Compatible with single-stage control circuits | Mounts to standard bracket with screw terminals
  • OEM vs Generic: This OEM transformer is wound to exact factory VA and voltage tolerances. Undersized or off-spec generic transformers can overheat under full control circuit load, tripping the internal thermal fuse and causing intermittent no-power faults.
  • Install difficulty: 2/5 — Disconnect power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or terminal connectors. Always verify 0V at primary terminals before touching wiring. Label all leads before disconnecting.
  • Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier C48A403562 packaged unit. Cross-references OEM part numbers HT01BD236 and HT01BD702. Verify your unit's control voltage and transformer VA rating on the data plate before ordering. Our fitment team is available to confirm compatibility before you buy — same-day shipping on all in-stock orders.

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 C48A403562 — Ships Today?
Yes. This is the factory-specified OEM transformer for the Carrier C48A403562 — 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 C48A403562 — 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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