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OEM Carrier DSI Control Board LH33WP002 for CP48P448P405511CP
Carrier

OEM Carrier DSI Control Board LH33WP002 for CP48P448P405511CP

SKU: CARRIE-CP48P448P405511CP-CONTROL_BOARD-LH33WP002 Brand: Carrier

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Texas CMBL #19328542014
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Govt POs Accepted

OEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP002 for Model CP48P448P405511CP

This is the factory OEM Direct Spark Ignition (DSI) control board for the Carrier CP48P448P405511CP packaged unit. The DSI control board orchestrates the entire ignition sequence — managing the inducer motor, spark igniter, gas valve, and flame verification in precise timed cycles. When this board fails, common symptoms include a hard lockout with no ignition attempt, intermittent no-heat calls, error code flashes, or a unit that sparks but never opens the gas valve. Replacing the board with the exact OEM part number LH33WP002 restores factory-programmed timing and safety lockout logic.

  • Specs: OEM Part Number LH33WP002 | Direct Spark Ignition (DSI) control board | Factory-programmed ignition timing and lockout sequencing | Compatible input voltage: 120V / 24V control circuit | Designed for Carrier CP48P448P405511CP packaged unit
  • OEM vs Generic: OEM control boards carry exact firmware and component tolerances specified by Carrier engineering. Aftermarket boards may use approximated timing logic that causes nuisance lockouts, voided warranties, or unsafe ignition sequencing — always use OEM for safety-critical ignition controls.
  • Install Difficulty: 3/5 — Requires disconnecting 120V power and discharging any stored voltage before board removal. Tools needed: 1/4" and 5/16" nut drivers, needle-nose pliers, phone or camera to photograph all harness connections before unplugging. Transfer wiring harnesses one connector at a time to avoid miswiring. Re-run a full heat call to verify proper ignition sequence after installation.
  • Warranty: 1-year OEM factory warranty against defects in materials and workmanship. Ships same business day from our warehouse when ordered before cutoff.

Compatibility: This board is the factory-specified replacement for Carrier model CP48P448P405511CP packaged gas/electric units. Always cross-reference OEM part number LH33WP002 and your unit's data plate before ordering to confirm fitment. Our parts specialists are available to verify compatibility before you purchase — don't guess on a control board. Order now and ship 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 Control Board fit my Carrier CP48P448P405511CP?
Yes. This is the factory-specified OEM control board for the Carrier CP48P448P405511CP. 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 CP48P448P405511CP?
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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