The flipper coil is hot to the touch after play.
Flipper coil gets very hot
Cause: The EOS switch is not opening at full stroke, or the hold winding is broken so the power winding carries the hold current.
Checks
- Check the EOS gap is about 1/8 in at full stroke and the contacts are clean.
- Measure the hold winding.
Fix
- Adjust and file the EOS switch, or replace the coil.
Systems
Related tips
- Flipper coils have two windings
- How the two windings of a flipper coil work
- Testing flipper coil diodes
- How a System 11 flipper coil works
- New flipper coil overheats and burns
- Flipper coil burns or flipper very weak after a rebuild
- Measuring a flipper coil's windings
- Removing and checking the flipper coil stop
Source: Repairing Williams System 11 Pinball 1986 to 1990, Part Two, Clay Harrell (pinrepair.com)