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OEM Carrier DSI Control Board LH33WP002 for TCHC2550HECMRAY900
OEM Carrier DSI Control Board LH33WP002 for TCHC2550HECMRAY900
OEM Carrier DSI Control Board LH33WP002 for TCHC2550HECMRAY900
OEM Carrier DSI Control Board LH33WP002 for TCHC2550HECMRAY900
Carrier

OEM Carrier DSI Control Board LH33WP002 for TCHC2550HECMRAY900

SKU: CARRIE-TCHC2550HECMRAY900-CONTROL_BOARD-LH33WP002 Brand: Carrier
✓ Guaranteed to fit TCHC2550HECMRAY900 — or your money back. Terms

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Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

OEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP002 for Model TCHC2550HECMRAY900

This is the genuine OEM Carrier Direct Spark Ignition (DSI) Control Board, part number LH33WP002, factory-specified for the Carrier TCHC2550HECMRAY900 unit. The DSI control board serves as the brain of the heating system — sequencing the ignition process, monitoring flame presence, managing the gas valve, inducer motor, and blower fan, and executing safety lockout logic. When this board fails, common symptoms include a complete no-heat condition, repeated ignition trial lockouts, intermittent heating faults, or erratic blower behavior that cannot be resolved by resetting the thermostat.

  • Specs: Direct Spark Ignition (DSI) control board | 460V application | OEM part number LH33WP002 | Replaces superseded part LH33WP002A | Factory-matched firmware and relay logic for Carrier equipment
  • OEM vs Generic: This is a genuine Carrier OEM board — not an aftermarket clone. OEM boards carry factory-programmed timing sequences and relay ratings precisely matched to your unit. Aftermarket boards frequently use off-spec relays and untested firmware, risking nuisance lockouts, unsafe ignition timing, or premature failure.
  • Install Difficulty: 3/5 — Disconnect all power before servicing. Tools needed: 1/4" and 5/16" nut drivers, needle-nose pliers, phone camera (photograph all wiring harness connections before disconnecting). Transfer wiring harness connectors one-at-a-time to avoid miswiring. Clear any fault codes after installation and cycle the system through a full heating sequence to verify operation.
  • Warranty: 1-year OEM manufacturer warranty. In stock — ships same business day from our warehouse.

Compatibility: Designed for the Carrier TCHC2550HECMRAY900. This board also fits a range of Carrier, Bryant, and Payne packaged and commercial units in the 48, 574, 580, 581, 582, 583, 588, and 589 model series. Always verify your existing board's part number against LH33WP002 before ordering. Our HVAC parts specialists are available to confirm fitment — contact us before you buy if you have any questions.

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 Control Board fit my Carrier TCHC2550HECMRAY900?
Yes. This is the factory-specified OEM control board for the Carrier TCHC2550HECMRAY900. 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 control board on my Carrier TCHC2550HECMRAY900?
Difficulty: Advanced (1–2 hrs)
Step 1: Turn off breaker. Step 2: PHOTOGRAPH all wire connections before touching anything. Step 3: Label each wire with tape. Step 4: Disconnect all wires, remove old board. Step 5: Mount new board, reconnect all wires matching your photo exactly. Step 6: Restore power and test all modes. Exact part number match is critical.
My HVAC system is completely dead. What could be wrong?
Completely dead HVAC (no LED on board) = failed control board or blown fuse. Check board fuse first (3A or 5A, costs $1–$5). If fuse is good and board has power but no LED, board is dead. Always photograph wiring before replacing.
Is this control board 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 control board?
OEM essential. Control boards are model-specific with precise firmware and connector layouts. Aftermarket boards rarely match all functions and can cause intermittent failures or safety issues. Always match the exact OEM part number.
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
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