Daikin furnace inducer does not start; no ignition sequence begins, but control board has power.

Safety: Turn off power and gas. Flue gases are hazardous; do not operate the furnace with a known vent blockage.

Steps to check:

• Inspect venting: Check the PVC or metal vent and intake pipes outside for ice, leaves, nests, or other obstructions. Clear any blockage.
• Check inducer motor: Remove the inducer access cover (if present) and try to spin the inducer wheel by hand. It should move freely without grinding.
• Inspect pressure tubing: Ensure the small rubber or silicone tube from the inducer housing to the pressure switch is not cracked, kinked, or filled with water.
• Listen for motor: Restore power and call for heat. If the inducer hums but does not spin, or is silent, the motor may be failed and needs replacement.

Inducer and pressure switch diagnostics often require a manometer and electrical testing; have a technician verify draft and replace the Daikin inducer assembly or pressure switch as needed.