common on these are the fans going open circuit if one fan goes open circuit you loose the slow speed
but one fan will run on full speed
you need to work out if the fans are actualy ok or if they are broken electricly
also look at the relays they may be corroded internaly
this might help too
but one fan will run on full speed
you need to work out if the fans are actualy ok or if they are broken electricly
also look at the relays they may be corroded internaly
this might help too