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OEM Carrier DSI Control Board LH33WP003 for PY3PNA042090NB
OEM Carrier DSI Control Board LH33WP003 for PY3PNA042090NB
OEM Carrier DSI Control Board LH33WP003 for PY3PNA042090NB
OEM Carrier DSI Control Board LH33WP003 for PY3PNA042090NB
Carrier

OEM Carrier DSI Control Board LH33WP003 for PY3PNA042090NB

SKU: CARRIE-PY3PNA042090NB-CONTROL_BOARD-LH33WP003 Brand: Carrier
✓ Guaranteed to fit PY3PNA042090NB — 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 PY3PNA042090NB

This is the genuine OEM Carrier Direct Spark Ignition (DSI) Control Board, part number LH33WP003, factory-specified for the Carrier PY3PNA042090NB packaged unit. The DSI control board serves as the brain of your furnace or packaged gas heating system — it sequences the ignition process, monitors safety sensors (including pressure switches, limit switches, and flame sensing), and triggers a system lockout if an unsafe condition is detected. Common failure symptoms include a system that sparks but never lights, a unit that locks out after one or two ignition attempts, error codes on the board's diagnostic LED, or a complete no-heat condition with no response from the heating circuit.

  • Specs: 24 VAC control voltage | 208/230 VAC 60Hz system power | Direct Spark Ignition (DSI) sequence | Integrated diagnostic LED fault codes | OEM part numbers: LH33WP003 / LH33WP003A
  • OEM vs Generic: This OEM board is factory-programmed with exact ignition timing, lockout retry logic, and safety thresholds for the Carrier PY3PNA042090NB. Aftermarket boards may use generalized timing that can cause nuisance lockouts or, worse, unsafe ignition delays — always prefer OEM for gas-ignition control.
  • Install difficulty: 3/5 — Requires shutting off gas supply and 24V/line-voltage power before beginning. Photograph all wiring harness connections and connector positions before removal. Tools needed: flat-head and Phillips screwdrivers, 1/4" nut driver, needle-nose pliers. Always restore and verify gas connections before test firing. Professional installation recommended.
  • Warranty: 1-year OEM factory warranty against defects. In-stock and ships same business day from our warehouse.

Compatibility: Engineered and factory-matched for the Carrier PY3PNA042090NB packaged gas/electric unit. Also cross-references to LH33WP003A and ICP part number 1068-83-119A. Verify your existing board's part number on the label before ordering. Have a question about fitment? Our HVAC parts team confirms compatibility before you buy — contact us 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 $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 PY3PNA042090NB?
Yes. This is the factory-specified OEM control board for the Carrier PY3PNA042090NB. 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 PY3PNA042090NB?
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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