F06 appears and heater will not start; fan does not run or runs briefly then stops.

Safety first: Disconnect power before touching the blower assembly. Moving parts and live wiring are present.

• Check air intake: Inspect the combustion air intake screen or pipe for leaves, insects, or debris. Clear any blockage.
• Listen for blower operation: Call for heat and listen. If the blower hums but does not spin, the motor may be seized. If it is completely silent, check for power at the motor (requires a multimeter and electrical safety knowledge).
• Inspect blower wheel: Remove the blower access panel. Check that the blower wheel spins freely by hand and is not rubbing on the housing. Remove any debris.
• Check wiring and connectors: Ensure the blower harness is firmly plugged into the control board and that no wires are burnt or damaged.
• Professional replacement: If the blower motor is not receiving power or is mechanically failed, it will need replacement. This typically requires a technician to ensure proper sealing and combustion setup.