What are the specs for this Transformer?

The correct replacement for Carrier model C48A502762 is this exact part. It is the factory-specified replacement with exact OEM specifications. Using a part with different specifications can cause equipment damage or void your warranty. You can verify this by checking the data plate on your Carrier equipment which lists the model number C48A502762.

Is this transformer compatible with Bryant or Payne systems too?

Many Carrier parts are cross-compatible with Bryant and Payne systems since all three brands are manufactured by Carrier Global Corporation. The same physical part is often used across multiple brand labels with different model numbers. To verify cross-compatibility, check your Bryant or Payne equipment service manual for cross-compatible part numbers, or contact info@nationalhvacparts.com with your model number for confirmation.

Carrier

OEM Carrier Transformer 40VA 120V/24V for C48A502762

Name: OEM Carrier Transformer 40VA 120V/24V for C48A502762
Brand: Carrier
SKU: CARRIE-C48A502762-TRANSFORMER-HT01BD236
Price: 47.25 USD
Availability: InStock

SKU: CARRIE-C48A502762-TRANSFORMER-HT01BD236 Brand: Carrier

✓ Guaranteed to fit C48A502762 — or your money back. Terms

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OEM Carrier 40VA Control Transformer for Model C48A502762

This OEM control transformer is the factory-specified replacement for the Carrier C48A502762 packaged unit. The transformer steps down 120V line voltage to 24V AC to power the entire low-voltage control circuit — including the thermostat, contactor coil, and control board. When it fails, the result is total system unresponsiveness: the thermostat goes dark, relays won't energize, and nothing happens on a call for heating or cooling. It is one of the most commonly overlooked failure points in a full system no-start diagnosis.

Specs: 40VA rating | 120V primary / 24V secondary | Replaces OEM part numbers HT01BD236 and HT01BD702 | Factory-matched impedance and insulation class
OEM vs Generic: OEM transformers are wound and rated to Carrier's exact VA load specifications. Generic transformers may be undersized for the full control circuit draw, leading to premature thermal cutout trips or shortened service life.
Install difficulty: 2/5 — Disconnect power at the disconnect box before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Verify incoming voltage before reconnecting. Always label or photograph wiring before removal.
Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed for use in the Carrier C48A502762 packaged unit. Cross-references OEM part numbers HT01BD236 and HT01BD702 — both are direct replacements for this transformer position. Confirm your unit's control voltage requirement (24V) and VA rating on the equipment data plate before ordering. Our parts specialists are available to verify fitment prior to purchase.

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

OEM Carrier Transformer 40VA 120...

$47.25

Frequently Asked Questions

Does this Transformer fit my Carrier C48A502762?

Yes. This is the factory-specified OEM transformer for the Carrier C48A502762. 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 C48A502762?

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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OEM Carrier Transformer 40VA 120V/24V for C48A502762

OEM Carrier 40VA Control Transformer for Model C48A502762

Shipping Information

Return Policy

Frequently Asked Questions