Ultima Wt741 "door" Fault

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

Ultima WT741 intermittent 'door' fault likely linked to door lock or catch

The problem

On an Ultima WT741 washing machine, the door locks but the display does not show the door-lock light. The machine starts only sometimes and may stop before completing the cycle with the door fault flashing.

Likely cause

Most strongly supported diagnosis is that the machine believes the door is not closed correctly. The accepted reply suggests a possible faulty door lock or the door catch not operating the lock properly. If the flashing occurs in repeated countable groups, that would indicate an error code rather than a simple door-closed detection fault.

What fixed it

Check whether the door fault light is flashing continuously or in repeated countable groups. Continuous flashing points towards a door closure detection problem, with the door lock or door catch as the likely cause. If it flashes in groups, the flash count should be noted as an error code for further diagnosis. The exact repair was not confirmed in the discussion.

Checks to try

• Observed that the door locks but no door-lock light appears on the display
• Observed that the machine sometimes starts but does not finish the cycle
• Check whether the door fault light flashes continuously or in countable repeated groups
• If it flashes in groups, count the number of flashes between pauses

Parts or tools mentioned

• door lock
• door catch