hotpoint ice diamond fridge freezer model rfa52?

my fridge which is two years old stopped working on monday and started to defrost when i listened to it the motor sounded as if it was working but it also sounded as if water was trickling through the pipes. i ordered a new thermostat direct from hotpoint and fitted it ,it still did not freeze up.i unplugged the machine turned it upside down for an hour ,re righted it let it settle for afew hours turned it back on it now seems to be working have i done the right thing any sugestions?