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OEM Carrier DSI Control Board LH33WP003 for PY3PNA042090AA
OEM Carrier DSI Control Board LH33WP003 for PY3PNA042090AA
OEM Carrier DSI Control Board LH33WP003 for PY3PNA042090AA
OEM Carrier DSI Control Board LH33WP003 for PY3PNA042090AA
Carrier

OEM Carrier DSI Control Board LH33WP003 for PY3PNA042090AA

SKU: CARRIE-PY3PNA042090AA-CONTROL_BOARD-LH33WP003 Brand: Carrier
✓ Guaranteed to fit PY3PNA042090AA — 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 PY3PNA042090AA

This is the factory OEM Direct Spark Ignition (DSI) control board for the Carrier PY3PNA042090AA packaged heating and cooling unit. The DSI control board is the central brain of the furnace/heating section — it sequences the ignition trial, monitors flame sense feedback, controls the inducer and blower motor timings, and enforces safety lockout logic. When this board fails, common symptoms include a no-heat condition with repeated ignition lockout, erratic burner cycling, failure to prove flame even when the igniter and flame sensor are known-good, or a complete lack of response from the heating circuit despite 24V control power being present.

  • Specs: Direct Spark Ignition (DSI) control | OEM Part Number: LH33WP003 | Factory-matched board for Carrier PY3PNA042090AA | 24V control voltage input | Integrated safety lockout and retry logic
  • OEM vs Generic: This is a genuine OEM Carrier board — factory-programmed with the exact ignition timing, timed-off delays, and lockout sequences required by the PY3PNA042090AA. Aftermarket boards may use generic timing profiles that cause nuisance lockouts or void equipment warranties.
  • Install Difficulty: 3/5 — Requires safely disconnecting 24V and line-voltage wiring harnesses. Tools needed: ¼" nut driver, needle-nose pliers, multimeter, and camera/phone to photograph all connector positions before removal. Always shut off gas supply and disconnect power at the disconnect box before servicing. If uncertain, consult a licensed HVAC technician.
  • Warranty: 1-year OEM factory warranty against defects. Orders ship same business day when placed before 3PM local time.

Compatibility: Engineered and factory-specified for Carrier model PY3PNA042090AA. Verify the OEM part number LH33WP003 against your unit's wiring diagram or data label before ordering. Our HVAC parts specialists are available to confirm fitment — contact us before you order if you have any questions. In stock and ready to ship 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 PY3PNA042090AA?
Yes. This is the factory-specified OEM control board for the Carrier PY3PNA042090AA. 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 PY3PNA042090AA?
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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