After a flipper rebuild with a new coil, the right flipper coil gets extremely hot and the flipper fuses blow.

New flipper coil runs very hot and blows fuses: bad or reversed coil diodes

Cause: The coil's diodes had been damaged (the old wiring had been botched by a previous owner), so the coil was shorting or being held on.

Checks

• Compare the wiring and diode orientation on the new coil with the original and with the manual: the banded end of each diode goes to the power side.
• Test each coil diode in diode mode; replace any that read shorted or open.
• If the coil was miswired, also test the flipper driver transistors and diodes on the Fliptronics board before fitting new fuses.

Fix

• Replace the damaged diodes on the coil with new, tested ones fitted the right way round, then fit new fuses.

Systems

• WPC Fliptronics

Games

• The Getaway: High Speed II

Related tips

• How Fliptronics flippers work
• Checking flipper buttons and EOS switches in switch test
• Flipper stuck up but drops when the power goes off
• All flippers kick once at game start and then go dead
• Fliptronics: flipper button does not register in switch test
• Fliptronics board versions
• Upper flipper button wired but not used on some games
• Shorted or open bridge rectifiers

Source: Pinball Repair help group!! (Facebook group)