OEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP003 for Model PY1PNA024060ADBA

This is the genuine OEM Carrier Direct Spark Ignition (DSI) control board, part number LH33WP003, factory-specified for the Carrier PY1PNA024060ADBA packaged rooftop unit. As the central brain of the heating system, this Integrated Gas Control (IGC) board manages every critical combustion sequence — from initiating the spark igniter and opening the gas valve, to supervising flame sensing, inducer operation, blower motor timing, and safety lockout. When this board fails, the unit typically enters a hard lockout after a failed ignition trial, produces no heat, or displays fault codes that point directly to ignition or flame-sensing failure.

• Part Type & Function: Direct Spark Ignition (DSI) / Integrated Gas Control (IGC) board | Controls spark ignition, gas valve activation, combustion blower, indoor fan motor sequencing, flame sensing, and safety lockout logic
• OEM vs Generic: This is a genuine Carrier OEM board manufactured to original design tolerances — not a third-party aftermarket substitute. OEM boards preserve factory timing sequences, fault-code accuracy, and warranty eligibility. Generic DSI boards can introduce mismatched lockout timing and flame-sensing sensitivity, risking nuisance shutdowns or, worse, unsafe operation.
• Install Difficulty: 3/5 — Disconnect power and gas before beginning. Document all wiring harness connector positions with photos before removal. Tools required: ¼" nut driver, needle-nose pliers, multimeter (to verify 24V control circuit). Reconnect all low-voltage and line-voltage connectors firmly. Cycle unit through a full heat call to confirm ignition, flame hold, and blower sequence.
• Warranty & Shipping: Backed by Carrier OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Engineered as the direct factory replacement for Carrier model PY1PNA024060ADBA packaged rooftop units equipped with direct spark ignition heating. Verify your existing board's part number (LH33WP003 or LH33WP003A) against your unit data plate before ordering. Not sure it fits? Our HVAC parts specialists verify fitment before you buy — contact us today and ship with confidence.