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OEM Carrier DSI Control Board LH33WP003 for PY3GNA048090NB
OEM Carrier DSI Control Board LH33WP003 for PY3GNA048090NB
OEM Carrier DSI Control Board LH33WP003 for PY3GNA048090NB
OEM Carrier DSI Control Board LH33WP003 for PY3GNA048090NB
Carrier

OEM Carrier DSI Control Board LH33WP003 for PY3GNA048090NB

SKU: CARRIE-PY3GNA048090NB-CONTROL_BOARD-LH33WP003 Brand: Carrier
✓ Guaranteed to fit PY3GNA048090NB — 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 PY3GNA048090NB

This is the genuine OEM Carrier LH33WP003 Direct Spark Ignition (DSI) Control Board — the factory-specified replacement for the Carrier PY3GNA048090NB packaged rooftop unit. The DSI control board is the central brain of your unit's heating system: it sequences spark ignition, opens and closes the gas valve, controls combustion blower and indoor fan motors, and continuously monitors flame sensing to ensure safe operation. When this board fails, you'll typically experience a complete no-heat condition, repeated ignition lockout codes, or a system that sparks but never sustains a flame.

  • Specs: Direct Spark Ignition (DSI) microprocessor-based control | Manages spark igniter, gas valve, combustion blower, and indoor fan motor | LED status indicators for fault code diagnostics | Factory-matched to Carrier OEM specifications
  • OEM vs Generic: This is a genuine Carrier OEM board engineered to original design tolerances, ensuring full compatibility with all safety interlocks, timing sequences, and fault logic in the PY3GNA048090NB. Aftermarket boards may have mismatched timing or diagnostic codes that cause nuisance lockouts.
  • Install Difficulty: 3/5 — Disconnect power at the disconnect box before beginning. Document all wiring connections with photos before removal. Tools needed: ¼" nut driver, Phillips screwdriver, needle-nose pliers. Always restore power and run a full heat cycle to verify proper flame-sensing operation after installation.
  • Warranty: 1-year OEM factory warranty against defects in materials and workmanship. Ships same business day from our warehouse.

Compatibility: Designed for the Carrier PY3GNA048090NB packaged rooftop gas/electric unit. Also compatible with select Carrier, Bryant, and Payne rooftop models using the LH33WP003 control board — verify your unit's data plate and existing board part number before ordering. Need fitment confirmation? Our HVAC parts specialists are standing by to verify compatibility before you purchase.

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 PY3GNA048090NB?
Yes. This is the factory-specified OEM control board for the Carrier PY3GNA048090NB. 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 PY3GNA048090NB?
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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