I would love some advice because the information coming from my HVAC tech just doesn't make sense. I am sorry that I am likely getting terms wrong here.
We've lived in my house for a little under a year. When we moved in, during the summer, the fan on our outside unit wasn't able to start up so I had a tech come out and fix it. He said that the start capacitor was blown and installed a new one along with a start boost which was not on the before. Two days later the fan was not turning on again and the tech came back out and the hard start had exploded. When I say exploded I really mean it. All the guts were everywhere inside the unit.
Now a few weeks ago I had the system serviced for winter, and the hard start was blown again. The system had worked wonderfully, and I had even checked every now and then that the fan really was starting up. Everything seemed normal. It was even working when the tech opened the unit and discovered this.
The tech is recommending we get a static pressure test done to find out why this hard start is blowing. To me this doesn't make sense. The static pressure test checks how the air is moving through the duct work inisde the house. My issue is with the unit outside, not the inside unit. We don't have any cold/warm spots and I can't understand how the two could be related.
What would cause one of these capacitors to explode?