Equipment Brands
There are approximately 150 different brand names of HVAC equipment on the market today. Those 150 brands are manufactured by 6 companies. For example, a Coleman furnace or air conditioning unit is the exact same thing as a Luxaire furnace or air conditioning unit. The only difference is cosmetic - they are different colors and have different names on them. The inner controls are all identical from one model to the next. Also, those inner controls are made by only a few companies that sell the same parts to each manufacturer.
In simple terms, if you have a Carrier air conditioning condenser and your neighbor has a Goodman condenser, they most likely have the same brand of compressor, contactor and capacitor underneath their exterior sheet metal.