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OEM Carrier Transformer 40VA 120V-24V for C48A202752 — Ships Today
Carrier

OEM Carrier Transformer 40VA 120V-24V for C48A202752 — Ships Today

SKU: CARRIE-C48A202752-TRANSFORMER-HT01BD236 Brand: Carrier

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Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

OEM Carrier 40VA Control Transformer for Model C48A202752

This OEM Carrier transformer (part number HT01BD236) is the factory-specified replacement for the C48A202752 packaged unit. The transformer steps line voltage (120V) down to 24V AC to power the low-voltage control circuit — including the thermostat, contactor coil, and control board. When the transformer fails, absolutely nothing in the control system will respond: the thermostat goes blank, the system won't call for heating or cooling, and no fault codes will appear because the board itself loses power.

  • Specs: 40VA rated | 120V primary / 24V secondary | Factory OEM part number HT01BD236 | Built-in thermal overload protection | Designed for Carrier packaged unit applications
  • OEM vs Generic: OEM transformers are wound to exact VA and voltage specs for your unit. Undersized or off-spec generic transformers can blow the fuse on the control board or fail prematurely under the full 40VA load of a multi-stage system.
  • Install difficulty: 2/5 — Turn off all power at the disconnect before starting. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Photograph or label existing wiring connections before removing the old transformer. Verify primary and secondary voltage with a meter after installation before restoring full system power.
  • Warranty: 1-year OEM factory warranty against defects. Stocked in our warehouse and ships same business day when ordered before 3PM local time.

Compatibility: Designed for the Carrier C48A202752 packaged unit. Before ordering, verify the transformer's VA rating and primary/secondary voltages on your unit's wiring diagram or data plate to ensure correct fitment. If you're unsure, our HVAC parts team will confirm compatibility before your order ships. Order now — in stock and ships today.

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 C48A202752 — Ships Today?
Yes. This is the factory-specified OEM transformer for the Carrier C48A202752 — 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 C48A202752 — 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
HVAC Parts Specialist — Online