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OEM Carrier DSI Control Board LH33WP003 for PY1RPA120180ABWB
OEM Carrier DSI Control Board LH33WP003 for PY1RPA120180ABWB
OEM Carrier DSI Control Board LH33WP003 for PY1RPA120180ABWB
OEM Carrier DSI Control Board LH33WP003 for PY1RPA120180ABWB
Carrier

OEM Carrier DSI Control Board LH33WP003 for PY1RPA120180ABWB

SKU: CARRIE-PY1RPA120180ABWB-CONTROL_BOARD-LH33WP003 Brand: Carrier
✓ Guaranteed to fit PY1RPA120180ABWB — 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 PY1RPA120180ABWB

This is the genuine OEM Carrier Direct Spark Ignition (DSI) control board, part number LH33WP003, factory-specified for the Carrier PY1RPA120180ABWB packaged rooftop unit. As the brain of your system's heating sequence, this integrated furnace control (IFC) board manages spark ignition timing, gas valve activation, inducer and blower motor operation, flame sensing, and safety lockout logic. When it fails, symptoms include no-heat calls, ignition lockouts after a trial-for-ignition, intermittent blower faults, or a completely unresponsive unit despite normal thermostat signals.

  • Specs: Direct Spark Ignition (DSI) control | Microprocessor-based logic | 24V control circuit input | Onboard LED fault code diagnostics | Factory OEM part number LH33WP003
  • OEM vs Generic: This is a genuine Carrier OEM board — not an aftermarket substitute. OEM boards are programmed to exact factory timing tolerances for ignition trials, blower delays, and safety lockout sequences. Aftermarket alternatives may use broader tolerances that can cause nuisance lockouts or accelerate wear on connected components such as the gas valve and inducer motor.
  • Install Difficulty: 3/5 — Disconnect power and gas supply before beginning. Document all wiring connector positions with photos prior to removal. Tools needed: #2 Phillips screwdriver, 1/4" and 5/16" nut drivers, needle-nose pliers. Clear any stored fault codes after installation and verify ignition sequence through a full heat call cycle.
  • Warranty: 1-year OEM manufacturer warranty. In-stock and ships same business day from our climate-controlled warehouse.

Compatibility: Designed for the Carrier PY1RPA120180ABWB packaged rooftop unit. Always verify the OEM part number on your existing board's label before ordering, as control board revisions (e.g., LH33WP003A) may apply to your specific unit serial range. Need help confirming fitment? Our HVAC parts specialists verify compatibility before you order — no guesswork.

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 PY1RPA120180ABWB?
Yes. This is the factory-specified OEM control board for the Carrier PY1RPA120180ABWB. 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 PY1RPA120180ABWB?
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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