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OEM Carrier DSI Control Board LH33WP002 for CP48P348P303010CP
Carrier

OEM Carrier DSI Control Board LH33WP002 for CP48P348P303010CP

SKU: CARRIE-CP48P348P303010CP-CONTROL_BOARD-LH33WP002 Brand: Carrier

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Texas CMBL #19328542014
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OEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP002 for Model CP48P348P303010CP

This is the factory OEM Direct Spark Ignition (DSI) control board for the Carrier CP48P348P303010CP packaged unit. The DSI control board is the brain of the heating system — it sequences the ignition process by controlling the inducer motor, spark igniter, gas valve, and flame verification circuit. When this board fails, you may experience a hard lockout with no ignition attempt, intermittent no-heat calls, failure to prove flame, or a system that sparks but never opens the gas valve. Replacing the board with the correct OEM part restores factory-precise timing and sequencing logic.

  • Specs: OEM Part Number LH33WP002 | Direct Spark Ignition (DSI) control board | 24V control circuit | Factory-matched timing sequences for inducer pre-purge, spark, and flame hold — exact fit for Carrier CP48P348P303010CP
  • OEM vs Generic: OEM boards use factory-programmed microcontrollers with correct lockout timing, fault codes, and safety thresholds. Aftermarket boards can introduce ignition delays or miscode fault conditions, leading to nuisance lockouts or undetected safety faults.
  • Install Difficulty: 3/5 — Disconnect all power before servicing. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, phone or camera to photograph all wiring harness connections before removal. Take note of jumper/dip switch positions. The board mounts to the unit's control panel via standoffs; transfer all connectors one at a time to avoid miswiring.
  • Warranty: 1-year OEM factory warranty against defects. In-stock and ships same business day from our warehouse when ordered before cutoff.

Compatibility: Engineered as a direct OEM replacement for the Carrier CP48P348P303010CP packaged gas/electric unit. Always cross-reference OEM part number LH33WP002 against your unit's data plate and wiring diagram before installation. Have questions about fitment? Our HVAC parts specialists verify compatibility before you order — contact us before placing your order.

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 CP48P348P303010CP?
Yes. This is the factory-specified OEM control board for the Carrier CP48P348P303010CP. 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 CP48P348P303010CP?
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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