iwe8123 washer

hi guys this was showing f11 pump was burnt out . i checked i was geting 240 v to pump so fitted a universal askoll pump as didnt have correct one at time .fills washes then goes to rinse drain, drains for about 30 secs then f11 flashes ,an cant stop machine unless i un plug it . someone has said it might be cause the one i took off was a 34 watt pump an the one i fitted was only a 25 watt one . can this be the case , ?surely these machines arnt that clever ? or am i barking up wrong tree here an the module is damaged ? help please 😥