i had a problem with my AC and the guy they sent out was very professional and was able to make the repair in very short order. When I paid the bill I also gave the guy 30 bucks as a tip. He tried to give it back and I wouldn't take it. He said he has been doing service work for over 2 years and I was the first person to ever give him a tip. So my question is do you tip and how much, the bill for the repair was only 125.00. I also do garage door service and I can count on two hands the number of times I have been given a tip I. Over 20 years.