What are the specs for this Transformer?

The correct replacement for Carrier model PF4MNB037000ABAA 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 PF4MNB037000ABAA.

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 208/230V–24V for PF4MNB037000ABAA

Name: OEM Carrier Transformer 40VA 208/230V–24V for PF4MNB037000ABAA
Brand: Carrier
SKU: CARRIE-PF4MNB037000ABAA-TRANSFORMER-HT01CN241
Price: 47.25 USD
Availability: InStock

SKU: CARRIE-PF4MNB037000ABAA-TRANSFORMER-HT01CN241 Brand: Carrier

✓ Guaranteed to fit PF4MNB037000ABAA — or your money back. Terms

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OEM Carrier 40VA Control Transformer HT01CN241 for Model PF4MNB037000ABAA

This is the genuine OEM Carrier replacement transformer (part# HT01CN241) for the Carrier PF4MNB037000ABAA fan coil and air handler series. The 24V control transformer is the heartbeat of your HVAC control circuit — it steps down the 208/230V line voltage to the 24V AC signal that powers your thermostat, control board relays, and zone valves. When this transformer fails, the entire control circuit goes dark: the thermostat shows no power, the system refuses to heat or cool, and no error codes are generated because there's no power to generate them.

Specs: 40VA capacity | 208/230V primary input | 24V AC secondary output | Foot-mount configuration | Direct OEM replacement for Carrier part# HT01CN241
OEM vs Generic: OEM transformers are wound to exact factory VA and voltage specifications, protecting sensitive control boards from voltage fluctuations. Generic units often under-deliver VA capacity, causing intermittent control lockouts and premature board failures.
Install difficulty: 2/5 — Shut off all power at the breaker before starting. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Label all 24V low-voltage wires before disconnecting. Verify fuse or circuit breaker on secondary side before condemning the transformer.
Warranty: 1-year OEM manufacturer warranty. In-stock units ship same business day from our warehouse.

Compatibility: Engineered for the Carrier PF4MNB037000ABAA fan coil unit. Also cross-references to ICP, Heil, Tempstar, and Comfortmaker systems sharing the HT01CN241 specification. Verify your existing transformer's primary voltage, secondary voltage, and VA rating against your unit's data plate before ordering. Our fitment team is available to confirm 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 $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 208...

$47.25

Frequently Asked Questions

Does this Transformer fit my Carrier PF4MNB037000ABAA?

Yes. This is the factory-specified OEM transformer for the Carrier PF4MNB037000ABAA. 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 PF4MNB037000ABAA?

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 208/230V–24V for PF4MNB037000ABAA

OEM Carrier 40VA Control Transformer HT01CN241 for Model PF4MNB037000ABAA

Shipping Information

Return Policy

Frequently Asked Questions