What are the specs for this Transformer?

The correct replacement for Carrier model C4850C50AY06061 — Ships Today 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 C4850C50AY06061 — Ships Today.

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.

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OEM Carrier 40VA 120V to 24V Control Transformer for C4850C50AY06061 — Ships Today

Name: OEM Carrier 40VA 120V to 24V Control Transformer for C4850C50AY06061 — Ships Today
Brand: Carrier
SKU: CARRIE-C4850C50AY06061-TRANSFORMER-HT01BD236
Price: 47.25 USD
Availability: InStock

SKU: CARRIE-C4850C50AY06061-TRANSFORMER-HT01BD236 Brand: Carrier

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OEM Carrier 40VA Control Transformer for Model C4850C50AY06061

This is the OEM factory-replacement control transformer (part number HT01BD236) for the Carrier C4850C50AY06061 packaged unit. The transformer steps down line voltage (120V) to the 24V signal used by your thermostat, control board, contactor coil, and all low-voltage safety circuits. When this component fails, the entire control circuit goes dark — the thermostat shows no response, the system won't call for heating or cooling, and no contactor or valve will energize. A failed transformer is one of the most overlooked causes of a completely unresponsive HVAC system.

Specs: 40VA rating | Primary: 120V | Secondary: 24V | OEM part number HT01BD236 | Factory-matched for Carrier C4850C50AY06061 packaged units
OEM vs Generic: This OEM transformer is wound to exact factory VA and voltage tolerances. Undersized or off-tolerance generic transformers can trip thermal cutoffs prematurely, overload under multi-zone demand, or produce voltage sag that causes nuisance lockouts on the control board.
Install difficulty: 2/5 — Shut off all power at the disconnect before proceeding. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter, needle-nose pliers. Label and photograph all low-voltage wiring connections before removal. Verify 24V output with a multimeter after installation before restoring system operation.
Warranty: 1-year OEM factory warranty. Orders placed before cutoff ship same business day from our climate-controlled warehouse.

Compatibility: Engineered specifically for the Carrier C4850C50AY06061 packaged unit. Cross-reference OEM part number HT01BD236 against your unit's data plate and wiring diagram before ordering. If you are unsure of fitment, our HVAC parts specialists can verify compatibility before your order ships — no guesswork required.

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 40VA 120V to 24V Con...

$47.25

Frequently Asked Questions

Does this Transformer fit my Carrier C4850C50AY06061 — Ships Today?

Yes. This is the factory-specified OEM transformer for the Carrier C4850C50AY06061 — 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 C4850C50AY06061 — 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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OEM Carrier 40VA 120V to 24V Control Transformer for C4850C50AY06061 — Ships Today

OEM Carrier 40VA Control Transformer for Model C4850C50AY06061

Shipping Information

Return Policy

Frequently Asked Questions