Same-day shipping before 3PM CST · 35,000+ OEM Parts · Texas CMBL & SAM.gov Registered · Government POs Accepted

Menu

Home Shop All Account Cart
OEM Carrier Transformer 208/230V 40VA for PF4MNA037000AAAA
Carrier

OEM Carrier Transformer 208/230V 40VA for PF4MNA037000AAAA

SKU: CARRIE-PF4MNA037000AAAA-TRANSFORMER-HT01CN241 Brand: Carrier
✓ Guaranteed to fit PF4MNA037000AAAA — or your money back. Terms

OEM Guaranteed

Same-Day Ship

30-Day Returns

Secure Checkout

Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

OEM Carrier Control Transformer 208/230V 40VA — HT01CN241 for Model PF4MNA037000AAAA

This OEM Carrier transformer (part number HT01CN241) is the factory-specified replacement for the Carrier PF4MNA037000AAAA fan coil/air handler unit. The transformer steps down line voltage from 208/230V primary to a safe 24V secondary at 40VA, powering the entire low-voltage control circuit — including the thermostat, contactor coil, and control board. When this transformer fails, nothing in the system responds: the thermostat goes blank, the blower won't energize, and no heating or cooling call is answered. It is often the first component to diagnose when a system appears completely dead despite line voltage being present at the unit.

  • Specs: 208/230V primary | 24V secondary | 40VA power rating | Direct OEM replacement for Carrier part HT01CN241
  • OEM vs Generic: OEM transformers are wound to exact VA and voltage tolerances required by Carrier. Undersized or off-spec generic units can cause nuisance fuse blows, control board damage, or intermittent lockouts — OEM is always the safer choice for the control circuit backbone.
  • Install difficulty: 2/5 — Shut off all power to the unit before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Photograph all wiring connections before disconnecting. Confirm 24V output with a multimeter after installation before reassembling the panel.
  • Warranty: 1-year OEM manufacturer warranty. In-stock units ship same business day when ordered by 3 PM local time.

Compatibility: Engineered as a direct OEM replacement for the Carrier PF4MNA037000AAAA fan coil unit. Verify your unit's data plate shows a 208/230V primary and 24V/40VA control circuit before ordering. Not sure? Our HVAC parts specialists verify fitment before you buy — contact us today and get your system back online fast.

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

Frequently Asked Questions

Does this Transformer fit my Carrier PF4MNA037000AAAA?
Yes. This is the factory-specified OEM transformer for the Carrier PF4MNA037000AAAA. 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 PF4MNA037000AAAA?
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.
Home Shop Search Account Cart
Fitment Guaranteed
MR
Mike Rivera
HVAC Parts Specialist — Online