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 40VA 120V/24V for P1011200 — HT01BC208
Carrier

OEM Carrier Transformer 40VA 120V/24V for P1011200 — HT01BC208

SKU: CARRIE-P1011200-TRANSFORMER-HT01BC208 Brand: Carrier

OEM Guaranteed

Same-Day Ship

30-Day Returns

Secure Checkout

Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

OEM Carrier 40VA Control Transformer for Model P1011200 — Part# HT01BC208

This OEM control transformer (part# HT01BC208) is the factory-specified replacement for the Carrier P1011200 system. The transformer steps down 120V line voltage to the 24V signal required by your thermostat, control board, contactor coil, and zone controls. When this component fails, the entire low-voltage control circuit goes dead — your thermostat goes blank, the system won't respond to any call for heating or cooling, and no fault codes will appear because the board itself has lost power. It is one of the most overlooked root causes of a completely unresponsive HVAC system.

  • Specs: 40VA rating | Primary: 120V | Secondary: 24V | Class 2 transformer | Direct OEM replacement, factory-matched to Carrier P1011200 specifications
  • OEM vs Generic: OEM transformers are wound and insulated to exact factory tolerances, ensuring stable 24V output under full load. Generic units often sag under load, causing intermittent thermostat dropouts, nuisance lockouts, and premature contactor coil failure.
  • Install difficulty: 2/5 — Shut off all power at the breaker and disconnect switch before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, wire stripper, multimeter to confirm 24V output after installation. Label and photograph all wiring connections before removing the old unit.
  • Warranty: 1-year OEM factory warranty. In-stock and ships the same business day from our climate-controlled warehouse.

Compatibility: Designed for the Carrier P1011200 system using OEM part number HT01BC208. Always confirm primary voltage (120V) and VA rating on your existing transformer's label before ordering. If your system uses a 208/240V primary, do not substitute this unit. Our parts specialists are available to verify fitment — reach out before you order and we'll confirm compatibility on your behalf.

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 P1011200 — HT01BC208?
Yes. This is the factory-specified OEM transformer for the Carrier P1011200 — HT01BC208. 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 P1011200 — HT01BC208?
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