Us to do a good job installing their equipment?
I sold a 2 ton Goodman heat pump system the other day.
My installers put it in and upon start up relized there was NO refrigerant in the condenser. Not because the factory forgot to charge it. It was because the factory forgot to mount the compressor and it fell over during shipping and mashed in the side of the coil!
Its not that I'm trying to bash a brand, but things like this do turn you off from selling that particular brand.