In the peak summer and winter months, it's not uncommon for technicians to work up to 80 hrs a week. And, of course, that's when the weather is at its worst. Either technicians are melting in the sun or freezing in the snow on rooftops and in attics. Customers aren't usually too pleasant either when their equipment breaks down in extreme conditions, and it seems that components are required to break down in the middle of the night or on weekends.
There's no question, it can be a rough life. It's sometimes difficult to remember that technicians have their home lives as well - spouses and children that are waiting for them to get home. When another service call arises and the employer says "Go take care of it," the technician often has little choice but to go.