WMUD843 MAIN PCB module connections

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

Hotpoint WMUD843 main PCB connector positions queried after module replacement

The problem

A Hotpoint WMUD843 washing machine had gone completely dead. A repairer had diagnosed the main control module, and the owner fitted a pre-programmed replacement PCB but was unsure which of three PCB connector positions should take one of the small plugs.

Likely cause

Misplaced wiring on the replacement main PCB was the main issue discussed. A faulty second-hand replacement board was also mentioned as a possibility later, but this was not confirmed.

What fixed it

The accepted advice was to remove the plastic cover and inspect the solder/connection marks on the PCB to identify which two connector positions had been used previously and which one was unused. The owner indicated this resolved the connector-position query. Later, when the display responded but the machine still would not start a cycle, no confirmed repair was given. Circuit diagrams were said not to be available publicly.

Checks to try

• Checked the PCB connection points for long-term connector marks and identified the unused position
• Observed that after refitting, the display responded but the wash cycle would not start
• Planned to check that the connectors were fully seated

Parts or tools mentioned

• Main control module / PCB
• Plastic cover