Searches swing with the season: 'AC repair' and 'AC not cooling' in summer, 'furnace repair' and 'heat pump not working' in winter, and tune-up searches in the weeks either side. A profile that only talks about one half of the business is invisible for half the year.
The competition is often crowded: several local outfits, a franchise or two, and paid ads above the map. When everyone's phone is ringing, the profiles that rank are usually the ones kept up through the shoulder months, not the ones scrambled together in July.
Customers choosing an HVAC company read reviews for reliability and for whether the technician explained the problem. Replacements get compared carefully; repair calls go to whoever looks trustworthy and can come soonest.