I just bought a used Jenn Air built in fridge. I plugged it in and it seems to buzz a little louder than expected and only gets to 41 degrees in the fresh food compartment. Also seems like the evaporator fan does not spin often or fast enough. It's run for 12 hours so it should be to temperature by now. Model number is JS42PPDBDA. I was told it was seven years old. Any insight would be appreciated...