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OEM Carrier DSI Control Board LH33WP003 for PY1RPA036074ABWA
OEM Carrier DSI Control Board LH33WP003 for PY1RPA036074ABWA
OEM Carrier DSI Control Board LH33WP003 for PY1RPA036074ABWA
OEM Carrier DSI Control Board LH33WP003 for PY1RPA036074ABWA
Carrier

OEM Carrier DSI Control Board LH33WP003 for PY1RPA036074ABWA

SKU: CARRIE-PY1RPA036074ABWA-CONTROL_BOARD-LH33WP003 Brand: Carrier
✓ Guaranteed to fit PY1RPA036074ABWA — or your money back. Terms

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Texas CMBL #19328542014
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OEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP003 for Model PY1RPA036074ABWA

This is the genuine OEM Carrier Direct Spark Ignition (DSI) control board, part number LH33WP003, factory-specified for the Carrier PY1RPA036074ABWA packaged rooftop unit. As the brain of your heating system, this microprocessor-based board orchestrates every critical ignition and safety function. When it fails, you may experience a complete no-heat condition, repeated ignition lockouts, blower motor faults, or the unit cycling off shortly after a call for heat. Fault LED indicators on the board itself can help pinpoint the exact failure mode before replacement.

  • Part Type: Direct Spark Ignition (DSI) Integrated Control Board | OEM Part# LH33WP003 | Fits Carrier PY1RPA036074ABWA packaged rooftop units
  • OEM vs Generic: This factory-original board is manufactured to Carrier's exact design specifications, ensuring full compatibility with all onboard sensors, motors, and safety circuits. Aftermarket alternatives may not replicate original timing sequences or lockout logic, risking nuisance shutdowns or undetected unsafe conditions.
  • Install Difficulty: 3/5 — Requires disconnecting 24V control wiring harnesses, high-voltage blower motor leads, and gas valve connections. Tools needed: Phillips and flat-head screwdrivers, 1/4" nut driver, multimeter, and phone or camera to photograph all wiring before removal. Always shut off power and gas supply before beginning. 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 for next-day delivery to most US locations.

Compatibility: Engineered as the direct OEM replacement for Carrier model PY1RPA036074ABWA packaged rooftop units equipped with Direct Spark Ignition. Verify your existing board's part number on the label before ordering to confirm an exact match. Have questions about fitment? Our HVAC parts specialists verify compatibility before you order — contact us today and get back up and running fast.

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 PY1RPA036074ABWA?
Yes. This is the factory-specified OEM control board for the Carrier PY1RPA036074ABWA. 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 PY1RPA036074ABWA?
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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