as Jocko suggested its most likely to be something broken or bent or loose that may be repairable without replacing the whole unit and may be obvious if you look closely. It shouldnt take long to see if its something that can be bashed out, bolted up,or even fixed with cable ties, or beyond repair such as a fan blade broken off.
If a customer is paying the bill (and expecting guaranteed results,) garages prefer to replace whole units rather than spending time trying to repair it. That way the parts maker is held liable for any further problem , rather than their 'bodge'.
Parts are usually described as left or right where they differ. Taken when sitting in the car looking forward. If parts also differ between left and right hand drive cars (such as headlights) it will also include lhd/rhd.
But in this case one fan is described as heater /Radiator and the other as air conditioner -condenser. All you need know is which of the two its cooling. . No offence, but if,with some further investigation I still couldnt tell which is which I'd begin to doubt whether I should be doing the job myself.
That said the broken part probably has the original part number on it somewhere.
