Miele [F252] fault codewhat it means and how to fix it

F252 is one of Miele’s smaller owner-fixable codes and a good example of the value of their documentation, because without it this would be an inscrutable fault. Their stated cause is that the door contacts in the area of the door hinge are dirty, and their remedy is to clean them, contacting Service only if it persists.

What is happening is that the machine confirms the door is properly shut through electrical contacts rather than a mechanical catch alone, and those contacts sit near the hinge where they collect the same film of detergent residue, fabric conditioner and lint that coats everything else in a washing machine. A dirty contact makes an intermittent connection, and an intermittent connection reads to the control board as a door that keeps opening and closing.

The practical note is to clean gently and dry. These are electrical contacts on a machine you have just unplugged, so a dry cloth or a barely damp one is right, and anything abrasive is not — the plating on a contact is thin, and scouring it off makes the problem permanent. If cleaning them fixes it for a fortnight and then it returns, mention that pattern to the engineer, because a contact that dirties that fast usually means water is getting somewhere it should not.

1. 1

   Switch the machine off and unplug it before touching any contacts.

2. 2

   Open the door fully and find the contacts in the recess near the hinge side.

3. 3

   Wipe them with a dry or barely damp cloth. Miele’s instruction is simply to clean them.

   Nothing abrasive and no scouring pad. The plating on a contact is very thin and taking it off turns an intermittent fault into a permanent one.
4. 4

   Let everything dry completely before plugging back in, then run a short cycle to test.

5. 5

   If it comes back within a few weeks, book an engineer and tell them how quickly it returned. That pattern points at water reaching somewhere it should not.