John W. Heisler III (Jack)
February 01, 1958 - June 23, 2025
Visitation: Thursday & Friday 4-8 pm; Devlin Funeral Home of Cranberry Township
Service: Saturday, June 28, 2025, Noon; Divine Grace Parish, St. Ferdinand Church
John W. Heisler III (Jack), a cherished husband, devoted father, and respected business owner of Allegheny Refrigeration, passed away peacefully on June 23, 2025, at the age of 67, surrounded by his loving family. Born in Pittsburgh, Pennsylvania, he was the son of the late John W. Heisler II and DeSales Heisler. Jack leaves behind a legacy rooted in love, hard work, and an unwavering passion for life.
He is lovingly remembered by his wife, Susan Heisler, with whom he shared a joyful marriage since October 11, 1986. Together, they built a close-knit family that brought him immense pride and happiness. Jack is survived by his children: John W. Heisler IV (Donna), Lauren Ratkus (Sean), and Brooke Heisler (Dillon Miller). He was a proud and doting “Pap” to his beloved 5 grandsons: Jack, Max, Sam, Calvin, and Arthur—whose laughter and love were the center of his world.
Jack was not only a family man, but also a lifelong car enthusiast. He found joy in restoring and tinkering with his collection of classic cars, always appreciating the craftsmanship behind each engine. His garage was a place of both precision and passion—where every detail mattered and projects were pursued with care and pride.
As a business owner, Jack exemplified integrity, dedication, and excellence. He took great pride in his work, leading by example and always showing up for others. Outside of work, he enjoyed the quiet peace of fishing and hunting, and he treasured beach vacations with his family—moments that became cherished traditions filled with stories, laughter, and love.
He is also survived by his sister, Leslie, and brother-in-law, Jimmy May, who will continue to honor Jack’s spirit of warmth, loyalty, and strength.
Family and friends are welcome to pay their respects on Thursday and Friday from 4–8 PM at Devlin Funeral Home of Cranberry Township, 2678 Rochester Road, Cranberry Township. A Mass of Christian Burial will be celebrated on Saturday at Noon at Divine Grace Parish, St. Ferdinand Church, with entombment to follow at Resurrection Cemetery, Moon Township.
In lieu of flowers, memorial donations may be made Make-A-Wish, greater PA & WV.
Though he may be gone, Jack’s legacy lives on in the hands he held, the engines he brought back to life, and the family whose lives he so deeply shaped. He will be forever missed and lovingly remembered.
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