Many HVAC companies are primarily sales-driven, not repair-driven.

That means that every time they come out to your house to "repair" something, they are primarily (and in many cases solely) interested in selling you something - mainly a brand-new unit, than actually repairing anything.

And every technician they hire is trained primarily in sales, plus the technician is given the sales quota he/she has to reach each month. Technicians are urged to sell UV lights, electronic air filters, humidifiers, surge protectors, high-voltage upgrades, etc...

And if your furnace or air conditioner is over 8 years old, they will always "highly recommend" that you buy a new unit. Some will even "highly recommend" a new unit after 5 years, since "Austin gets so hot in the summer".

Fair AC does not sell anything; our only interest is in repairing your AC in the most efficient and fair way.

Fair AC generally recommends getting a new system when your existing AC system is genially old and your repairs are so complicated and expensive, it objectively makes sense to just get a new unit. Expensive repairs on very old systems are particularly problematic because your aging system is likely to break down again within a couple of years after the expensive repair.