said by patcat88:I once saw a very old fridge that had 116v on the metal handle to ground. Nobody in decades ever complained about a shock from the fridge. It probably would never happen due to wood floor or skin resistance.
edit: FWIW my 1930s home has all polarized plugs from the 1930s
I was nearly killed as a child from a shock from a fridge with the same issue - receptacle polarity wired backwards. For some reason, I was touching the metal chasis of the range, and reached over to open the fridge. The shock went through my heart and put me into convulsions.
Best bet is for your dad (or you) to hire an electrician to fix it. Save up some money and pay for it yourself. Make your parents proud. It will be better than someone in your family getting killed over a relatively simple repair for a pro.
PS - my home from 1930 has all original 2-prong polarized receptacles; same as Patcat. (This of course excludes the ones that have been replaced with 3-prong devices.)