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OEM Carrier DSI Control Board LH33WP003 for PY2PNB030040AB
OEM Carrier DSI Control Board LH33WP003 for PY2PNB030040AB
OEM Carrier DSI Control Board LH33WP003 for PY2PNB030040AB
OEM Carrier DSI Control Board LH33WP003 for PY2PNB030040AB
Carrier

OEM Carrier DSI Control Board LH33WP003 for PY2PNB030040AB

SKU: CARRIE-PY2PNB030040AB-CONTROL_BOARD-LH33WP003 Brand: Carrier
✓ Guaranteed to fit PY2PNB030040AB — 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 LH33WP003 for Model PY2PNB030040AB

This is the genuine OEM Carrier Direct Spark Ignition (DSI) control board, part number LH33WP003, factory-specified for the Carrier PY2PNB030040AB packaged rooftop unit. The DSI control board is the brain of the heating system — it orchestrates spark ignition sequencing, gas valve activation, inducer and blower motor operation, flame sensing, and safety lockout logic. When this board fails, you may experience a no-heat condition, repeated ignition lockouts, or erratic fan behavior with no fault recovery. LED diagnostics on the board help technicians pinpoint fault codes during troubleshooting.

  • Specs: Direct Spark Ignition (DSI) microprocessor-based control | Manages combustion, blower, and indoor fan motors | Monitors spark igniter, gas valve, flame sensing, and safety lockout | Status LED fault code indicators for fast diagnostics | Factory part number: LH33WP003 / LH33WP003A
  • OEM vs Generic: This is a genuine Carrier factory-authorized OEM board manufactured to exact original design standards. Aftermarket substitutes may not match timing sequences, lockout parameters, or connector layouts — risking misdiagnosis, voided warranties, or recurring failure. OEM is always the correct choice for commercial rooftop applications.
  • Install difficulty: 3/5 — Disconnect power at the disconnect box and verify zero voltage before touching any board terminals. Tools needed: Phillips and flat-head screwdrivers, needle-nose pliers, smartphone or camera to photograph all wiring harness connections before removal. Transfer wiring one connector at a time. Re-verify all safety switch connections before restoring power.
  • Warranty: 1-year OEM factory warranty on this part. In stock and ships same business day from our warehouse when ordered before cutoff.

Compatibility: Factory-matched replacement for Carrier model PY2PNB030040AB packaged rooftop unit. Verify your existing board's part number (LH33WP003 or LH33WP003A) against your unit's data plate before ordering. Our HVAC parts specialists are available to confirm fitment — contact us before you order 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 PY2PNB030040AB?
Yes. This is the factory-specified OEM control board for the Carrier PY2PNB030040AB. 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 PY2PNB030040AB?
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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