I had a heat pump installed about a year ago. It came with one free service and the installing company has been calling me almost every week to come out and do the complimentary tune up. I know that I obviously should take a free tune up, but it made me wonder. How often do I actually need this done? What are they actually “tuning up”?
The only other thing that comes to my mind is if you have a pump with water/sole you should check the pressure from time to time to detect leaks.