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OEM Carrier DSI Control Board LH33WP003 for PY1RPA090180ACWB
OEM Carrier DSI Control Board LH33WP003 for PY1RPA090180ACWB
OEM Carrier DSI Control Board LH33WP003 for PY1RPA090180ACWB
OEM Carrier DSI Control Board LH33WP003 for PY1RPA090180ACWB
Carrier

OEM Carrier DSI Control Board LH33WP003 for PY1RPA090180ACWB

SKU: CARRIE-PY1RPA090180ACWB-CONTROL_BOARD-LH33WP003 Brand: Carrier
✓ Guaranteed to fit PY1RPA090180ACWB — 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 PY1RPA090180ACWB

This is the factory OEM Direct Spark Ignition (DSI) control board for the Carrier PY1RPA090180ACWB rooftop unit, supplied under part number LH33WP003. As the central brain of your unit's heating system, this board manages spark ignition sequencing, gas valve activation, combustion blower and indoor fan motor control, flame sensing, and safety lockout logic. When it fails, symptoms typically include a complete no-heat condition, repeated ignition lockout faults, a unit that starts briefly then shuts off, or non-responsive blower operation — all pointing directly to a failed DSI board.

  • Specs: Direct Spark Ignition (DSI) microprocessor-based control | Manages combustion, blower, and indoor fan motors | Controls spark igniter and gas valve timing | Integrated flame sensing and safety lockout | Onboard LED status indicators for fault code diagnostics
  • OEM vs Generic: This is a genuine Carrier OEM board engineered to exact factory specifications for the PY1RPA090180ACWB. Generic or aftermarket boards may lack full timing calibration and LED diagnostic capability, risking repeated nuisance lockouts or premature failure of connected components such as the gas valve and inducer motor.
  • Install difficulty: 3/5 — Requires disconnecting 24V and line-voltage wiring harnesses; photograph all connectors before removal. Tools needed: 1/4" and 5/16" nut drivers, needle-nose pliers, a multimeter for verifying 24V control signal. Always shut off the unit's main disconnect and gas supply before beginning work.
  • Warranty: 1-year OEM factory warranty against defects. In-stock and ships same business day from our warehouse when ordered before 3PM local time.

Compatibility: Engineered specifically for the Carrier PY1RPA090180ACWB packaged rooftop unit. Verify your unit's data plate matches part number LH33WP003 before ordering. Not sure if this board fits your unit? Our HVAC parts specialists verify fitment before you buy — contact us for confirmation.

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 PY1RPA090180ACWB?
Yes. This is the factory-specified OEM control board for the Carrier PY1RPA090180ACWB. 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 PY1RPA090180ACWB?
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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