The central air conditioner condenser is the part that sits outside which is costly to replace if it goes bad.
A new central air conditioner condenser can cost from $3,000.00 to $4,000.00 to replace with a new one.
You'll need to replace the entire unit that is outside which includes the ac compressor and then it will need to be purged and refilled with refrigerant which needs to be done by a qualified air conditioner technician.
Replacing just the ac compressor in a central air conditioner unit can cost as much as $1,000.00 to $2,000.00 so it's usually best to replace the entire condenser unit outside.