Refregerator and freezer getting to cold

After reading trouble shooting this problem I order a thermostat and figured it was worth the try, The part was less than $70.00 and having a reapairman come out would have been more then that just for the service call. Thermastat ended up being the problem, refregerator runninng fine now. Took less than 30 minutes to remove a replace part and probably saved twice that over calling in a repairman.