Some users think that repair may be provided without professional help and that is huge mistake because only qualified and experienced technicians are able to identify the damage problem correctly. Otherwise there exists danger to twist the knife. Unqualified repair may lead to complete breakdown of appliances.
When you have noticed that your kitchen machine functions in a different manner than earlier it is advisable to offer appliance repair. Ignoring the smallest failure may cause more serious problems.
Remember also that most equipment demand periodical repair because some parts have reduced serving term and every 3-5 years they should be replaced. Only original details should be used by specialists.