I have a Blomberg fridge/freezer self-defrost, purchased from Curry’s Model No. CFFN 311 combi fridge/freezer approx 7 years ago. 4 weeks ago it started defrosting and making really loud virbration sounds-defrosted itself and then froze again. This is the the way its been going for days, now the fridge is freezing everything in it even though I have turned it down. Any ideas what maybe wrong. Have just found model No. Thanks for any ideas.