Do problems really come in threes?

I have always believe that bad events come in threes.

#1. The desk top computer monitor went out

#2. The A/C went out. This can be a tragedy in Arizona in the summer.

So I said to spouse "What will be #3?".

"You don't believe that! " he responded.

So on the way to the city to have the computer checked out, his hearing aid went out.