WE SWITCHED OFF FRIDGE FOR CLEANING AND THEN STARTED IT DOES NOT COOLIN BOTTOM PART.UPPER PART HAS LITTLE COOLING BUT SNOW DOES NOT FORM.WE CALLED UP MAINTENANCE MAN ,HE IS TRYING SINCE LAST ONE WEEK BUT COULD NOT DO IT.CAN YOU SEND ME MANUAL .WE BOUGHT IT LAST YEAR .THIS MISTAKE HAD OCCURED THIRD TIME. PREVIOUSLY OTHER MAN WAS THERE AND HE REPLACE SOME PART. PLEASE HELP.