my central AC has not worked in years. the furnace/ac unit is 22 years old. I have received three estimates from $6,000 to $17,000. the least expensive one had a furnace/AC manufactured by "Goodwin." I never heard of that brand. The ac company seems ok they are a local family business started by the granddad 40+ years ago. I like them but the equipment has me concerned. Is it a good brand. I never heard of it before. It is getting hot and I need to get the ac working or my wife will kill me and the dog will bite me. Can you help me understand or find info on quality and reliability of heating A/C units?