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OEM Carrier DSI Control Board LH33WP003 for PY3GNA030040AB
OEM Carrier DSI Control Board LH33WP003 for PY3GNA030040AB
OEM Carrier DSI Control Board LH33WP003 for PY3GNA030040AB
OEM Carrier DSI Control Board LH33WP003 for PY3GNA030040AB
Carrier

OEM Carrier DSI Control Board LH33WP003 for PY3GNA030040AB

SKU: CARRIE-PY3GNA030040AB-CONTROL_BOARD-LH33WP003 Brand: Carrier
✓ Guaranteed to fit PY3GNA030040AB — 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 PY3GNA030040AB

This OEM Direct Spark Ignition (DSI) control board is the factory-specified replacement for the Carrier PY3GNA030040AB packaged heating and cooling unit. The DSI control board serves as the brain of the heating sequence — it orchestrates inducer startup, spark ignition timing, flame verification, gas valve activation, and system fault lockout logic. When this board fails, common symptoms include a complete no-heat condition, repeated ignition lockouts, failure to prove flame even when the igniter and flame sensor test good, or erratic short-cycling that cannot be traced to any individual component.

  • Specs: Direct Spark Ignition (DSI) control architecture | OEM part number LH33WP003 | Factory-matched to Carrier PY3GNA030040AB | Integrated fault code LED diagnostics | 24V control circuit compatible
  • OEM vs Generic: This is a genuine OEM Carrier board — identical firmware, relay ratings, and terminal layout to what left the factory. Aftermarket boards frequently carry mismatched timing sequences and lower-rated relays, risking nuisance lockouts and premature gas valve failure.
  • Install Difficulty: 4/5 — Control board replacement requires de-energizing the unit at the disconnect and breaker, photographing or labeling ALL wiring connections before removal, and verifying input/output voltages after reinstallation. Tools needed: multimeter, 1/4" and 5/16" nut drivers, needle-nose pliers, and a phone or camera for wiring documentation. Professional installation is recommended.
  • Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse when ordered before 3 PM local time.

Compatibility: Engineered specifically for Carrier model PY3GNA030040AB packaged units. Always cross-reference the OEM part number LH33WP003 printed on your existing board before ordering to confirm an exact match. Have questions about fitment? Our HVAC parts specialists verify compatibility before you buy — contact us before placing your order.

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 PY3GNA030040AB?
Yes. This is the factory-specified OEM control board for the Carrier PY3GNA030040AB. 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 PY3GNA030040AB?
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
HVAC Parts Specialist — Online