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OEM Carrier DSI Control Board LH33WP003 for PY2PNB030040NB
OEM Carrier DSI Control Board LH33WP003 for PY2PNB030040NB
OEM Carrier DSI Control Board LH33WP003 for PY2PNB030040NB
OEM Carrier DSI Control Board LH33WP003 for PY2PNB030040NB
Carrier

OEM Carrier DSI Control Board LH33WP003 for PY2PNB030040NB

SKU: CARRIE-PY2PNB030040NB-CONTROL_BOARD-LH33WP003 Brand: Carrier
✓ Guaranteed to fit PY2PNB030040NB — 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 PY2PNB030040NB

This OEM Direct Spark Ignition (DSI) control board is the factory-specified replacement for the Carrier PY2PNB030040NB packaged rooftop unit. The DSI control board is the brain of your unit's heating system — it orchestrates spark ignition sequencing, gas valve activation, blower and indoor fan motor operation, flame sensing, inducer motor control, and safety lockout. When it fails, symptoms typically include a complete no-heat condition, ignition lockout after a trial-for-ignition attempt, the system starting and then immediately shutting down, or erratic blower behavior. Fault codes displayed via onboard LED indicators can pinpoint the exact failure mode before you even order a part.

  • Specs: Direct Spark Ignition (DSI) microprocessor-based control | OEM Part # LH33WP003 | Monitors combustion, blower, and indoor fan motors | Manages spark igniter, gas valve, flame sensing, and safety lockout sequences
  • OEM vs Generic: This is a genuine Carrier OEM board manufactured to exact factory tolerances and firmware specifications. Aftermarket boards may lack proper timing calibration or full diagnostic LED functionality, risking nuisance lockouts and shortened equipment life.
  • Install difficulty: 3/5 — Requires disconnecting 24V control wiring and line-voltage harnesses. Always shut off power at the disconnect and gas supply before servicing. Tools needed: flathead and Phillips screwdrivers, 1/4" nut driver, needle-nose pliers, multimeter. Photograph all wiring connections before removal. Recommended for qualified HVAC technicians.
  • Warranty: 1-year OEM factory warranty against defects. Ships same business day from our warehouse — order by 3 PM local time to get it on its way today.

Compatibility: Designed for the Carrier PY2PNB030040NB packaged rooftop unit. Always verify the OEM part number on your existing control board's label before ordering, as board revisions (e.g., LH33WP003A) may apply. Questions about fitment? Our HVAC parts specialists verify compatibility before you buy — contact us before ordering.

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 PY2PNB030040NB?
Yes. This is the factory-specified OEM control board for the Carrier PY2PNB030040NB. 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 PY2PNB030040NB?
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