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OEM Carrier DSI Control Board LH33WP003 for PY3PNA048115NA
OEM Carrier DSI Control Board LH33WP003 for PY3PNA048115NA
OEM Carrier DSI Control Board LH33WP003 for PY3PNA048115NA
OEM Carrier DSI Control Board LH33WP003 for PY3PNA048115NA
Carrier

OEM Carrier DSI Control Board LH33WP003 for PY3PNA048115NA

SKU: CARRIE-PY3PNA048115NA-CONTROL_BOARD-LH33WP003 Brand: Carrier
✓ Guaranteed to fit PY3PNA048115NA — 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 PY3PNA048115NA

This is the factory OEM Direct Spark Ignition (DSI) control board for the Carrier PY3PNA048115NA packaged unit. As the brain of the heating system, this microprocessor-based board orchestrates the entire combustion sequence — controlling the spark igniter, gas valve, combustion blower, and indoor fan motor. It also continuously monitors safety sensors to detect unsafe conditions and initiate system lockout when necessary. When the board fails, common symptoms include a no-heat condition, repeated ignition lockout faults, failure to prove flame, or the unit cycling on and off erratically without completing a full heating sequence.

  • OEM Part Number: LH33WP003 (also supersedes LH33WP003A) | Type: Direct Spark Ignition (DSI) Control Board | Application: Carrier PY3PNA048115NA packaged rooftop unit | Board Style: Integrated Furnace Control (IFC) with LCP
  • OEM vs Generic: This is the genuine Carrier-sourced OEM board, factory-matched to your unit's exact timing sequences, lockout logic, and safety thresholds. Aftermarket boards may substitute components with looser tolerances, risking nuisance lockouts, improper gas valve timing, or premature failure.
  • Install Difficulty: 3/5 — Requires shutting off power and gas supply before beginning. Photograph all wiring harness connections before disconnecting. Tools needed: ¼" nut driver, needle-nose pliers, multimeter. Always verify 24V control circuit is live before condemning the board. Consult the unit's wiring diagram located inside the cabinet door.
  • Warranty: 1-year OEM factory warranty against defects. Ships same business day from our warehouse when ordered before 3 PM local time.

Compatibility: Designed as the direct OEM replacement for Carrier model PY3PNA048115NA packaged units equipped with the LH33WP003 or LH33WP003A DSI control board. Verify your existing board's part number on the label before ordering. Not sure if this fits? Contact our HVAC parts specialists — we verify fitment before you buy. In stock and ships 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 PY3PNA048115NA?
Yes. This is the factory-specified OEM control board for the Carrier PY3PNA048115NA. 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 PY3PNA048115NA?
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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