Washer Dryer White (Yet Gritty Feeling) Powder In The Vents

This thread was marked as solved. Here's a summary of the problem and the fix, generated from the discussion below.

White gritty powder coming from door-seal vents on a 2-month-old Bosch washer-dryer

The problem

A 2-month-old Bosch washer-dryer was producing a fine white, gritty powder from the vents at the top of the door seal. The powder was falling onto the door and onto washing. The owner stated it was unlikely to be detergent, as liquid detergent was used without this issue on a previous machine.

Likely cause

The accepted reply stated the vent leads to the dryer heating element and housing, and that there should not be anything in there to account for the powder. The exact source of the residue was not confirmed.

What fixed it

The accepted advice was to clean out the vent area with a brush. Because more powder continued to come out, the owner booked a repair visit. No completed repair or confirmed fault was reported in the discussion.

Checks to try

• Location of the powder was identified as the vents at the top of the door seal
• Owner noted the residue was fine, white and gritty
• Owner reported more powder continued to come out after initial advice

Parts or tools mentioned

• Brush