Born on April 8, 1921, in Chicago, Illinois, Krenzler received an Artium Baccalaureus degree from Case Western Reserve University in 1946.

He was a trial attorney of the United States Internal Revenue Service in Washington, D.C., from 1960 to 1963.

He was a judge of the Court of Common Pleas in Cuyahoga County, Ohio, from 1968 to 1970.

[1] Krenzler was nominated by President Ronald Reagan on November 17, 1981, to a seat on the United States District Court for the Northern District of Ohio vacated by Judge Don John Young.

He spent most of his time in Florida where he rode his Harley Davidson motorcycle and engaged in boating and other outdoor activities.