Hotpoint First Edition 1200 Motor Tripping Electric

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

Hotpoint First Edition 1200 trips electrics when motor reaches high-speed spin

The problem

The Hotpoint First Edition 1200 was stopping mid-cycle when the drum motor should turn. After worn motor brushes were replaced, the machine initially ran, but then tripped the electrics during high-speed spin. With the lid off, heavy orange sparking was seen from the motor just before the trip.

Likely cause

A damaged motor wire appears to have been shorting/arcing to the motor housing. The accepted reply also noted that carbon dust contamination or a worn armature could cause a short to earth, but the poster later found visible wiring damage inside the motor area.

What fixed it

The motor was stripped down, the affected area cleaned, the damaged wire from the motor plug to the motor housing was replaced, and the motor was checked for further damage and continuity. No confirmed final test result was posted afterwards.

Checks to try

• Worn motor brushes found and replaced with genuine spares
• Continuity testing on the motor reported as ok
• TOC reported as fine
• Machine observed running with lid off; heavy orange sparking seen at high-speed spin
• Motor stripped down for inspection
• Damaged wire found with outer sheath cut and signs of arcing
• Motor checked for further damage after repair
• Continuity test repeated after repair

Parts or tools mentioned

• Genuine motor brushes
• Replacement motor wire
• Continuity tester
• Insulation test meter