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OEM Carrier DSI Control Board LH33WP002 for LC750LCCMRAYX500
Carrier

OEM Carrier DSI Control Board LH33WP002 for LC750LCCMRAYX500

SKU: CARRIE-LC750LCCMRAYX500-CONTROL_BOARD-LH33WP002 Brand: Carrier

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Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

OEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP002 for Model LC750LCCMRAYX500

This is the factory OEM Direct Spark Ignition (DSI) control board for the Carrier LC750LCCMRAYX500 furnace. The DSI control board is the brain of your heating system — it sequences the inducer motor, gas valve, spark igniter, and blower in precise timing. When this board fails, you may experience a hard lockout with no ignition attempt, repeated failed ignition cycles, an inducer that runs but no spark or gas call, or a system that powers on but produces no heat whatsoever. Fault codes displayed on the board's LED indicator are your first diagnostic clue.

  • Specs: Direct Spark Ignition (DSI) control | OEM Part Number: LH33WP002 | Factory-matched timing sequences for inducer, gas valve, and blower | Compatible input voltage: 120V / 24V control circuit
  • OEM vs Generic: This is a genuine Carrier OEM board, manufactured to exact factory specifications. Aftermarket boards frequently feature mis-matched timing delays and relay ratings that cause nuisance lockouts, premature component wear, and voided equipment warranties. Always choose OEM for control boards.
  • Install Difficulty: 4/5 — Control board replacement requires comfort with wiring diagrams and low/line voltage. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, phone or camera to photograph all wiring harness connections before removal. Disconnect power at the breaker and verify with a multimeter before beginning. If fault codes are present, document them prior to board replacement.
  • Warranty: 1-year OEM factory warranty against defects. Orders placed before cutoff ship same business day from our stocked warehouse.

Compatibility: Designed as a direct OEM replacement for the Carrier LC750LCCMRAYX500 furnace. Always cross-reference OEM part number LH33WP002 against your existing board's label before ordering to confirm fitment. If you have any fitment questions, our HVAC parts specialists will verify compatibility before you order — no guesswork required.

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 Control Board fit my Carrier LC750LCCMRAYX500?
Yes. This is the factory-specified OEM control board for the Carrier LC750LCCMRAYX500. 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 LC750LCCMRAYX500?
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
HVAC Parts Specialist — Online