OEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP002 for Model GAS075105

This OEM Direct Spark Ignition (DSI) control board is the factory-specified replacement for the Carrier GAS075105 gas furnace. The DSI control board serves as the central command module of your furnace — orchestrating the ignition sequence, managing the inducer motor, monitoring safety switches, and controlling the gas valve. When this board fails, common symptoms include a furnace that won't ignite, repeated lockout errors, an inducer that runs but never advances to ignition, or erratic on/off cycling that no thermostat adjustment can resolve.

• Specs: OEM Part Number LH33WP002 | Direct Spark Ignition (DSI) control type | 24V control circuit | Compatible with single-stage gas valve operation | Includes diagnostic LED fault indicator
• OEM vs Generic: This is a genuine OEM Carrier board programmed to factory timing sequences and safety lockout thresholds. Aftermarket boards often use approximated timing that can cause nuisance lockouts, premature component wear, or voided equipment warranties — the OEM board eliminates all of that risk.
• Install difficulty: 4/5 — Control board replacement requires working knowledge of 24V control circuits and high-voltage furnace wiring. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, phone or camera for wiring documentation, and a multimeter for voltage verification. Always disconnect power at the disconnect switch and shut off the gas supply before beginning. If unsure, consult a licensed HVAC technician.
• Warranty: 1-year OEM factory warranty against defects in materials and workmanship. Ships same business day from our stocked warehouse.

Compatibility: Engineered as the direct replacement control board for the Carrier GAS075105 gas furnace. Always verify your existing board's part number against LH33WP002 before ordering, and cross-reference your unit's data plate for voltage and staging specifications. Our fitment team is available to confirm compatibility before you purchase — don't guess on a control board.