Kosher food plants are pretty particular about quality, and they have to be if they want to maintain their Orthodox Union (OU) seal on the packaging of their products. One of the requirements to maintain the integrity of the OU seal is that a rabbi is the only person who can check the production system and give a blessing to restart a boiler if it should go down for any reason.
A major issue for an eastern Pennsylvania kosher food plant is that its rabbis don’t live near the plant; the closest is 90 miles away. Therefore, if a boiler goes down, and the plant loses steam, the plant has to wait two to four hours for a rabbi to arrive to bless and restart the boiler. This is a lot of production time to lose, and no plant manager wants to have any downtime in a production facility.