hi, need help samsung rs21ncsv side by side fridge freezer this ones mine and the wife is screeming for a new one , opened it today and everythings thawed out ,ive put it on power freeze this morning but it still shows -2 this evening . I read on here some time ago about a sticking thermostat , any advice on this one would be appreciated , but please hurry the wife looking for my bank card as i type this, thanks.