My AC system seemed to be running, but it wasn't cooling the house. Based on positive Yelp reviews, I called Infiniti and they sent Denis out to take a look. He arrived a few minutes ahead of schedule and quickly got to work and diagnosed the problem: the start/run capacitor had failed, so the compressor wasn't running. He had a replacement part with him and the system was back to blowing cool air within 15 minutes. Denis checked a few more things and explained what he was doing and why, which I really appreciated. The whole service call took about 30 minutes. Denis knows his stuff and is very professional.