AC compressor seals and "Honda black death"major
Beyond the generation's known condenser weakness, mechanics point at the compressor itself: O-ring and seal leaks that kill cooling ($1,800+ out of pocket, and the newer R-1234yf refrigerant is expensive), and in bad cases the compressor sheds metal fragments through the whole system — "black death" — typically at 40–100k miles. There is also a cheap gotcha: the AC pressure-switch wiring loop breaks by design flaw, a zero-dollar zip-tie-and-tape repair that some shops misdiagnose as a failed compressor. Test the AC hard before buying and ask for AC service records.
Sources: Independent mechanic channel transcripts (5th-gen CR-V), incl. Honda's official oil-dilution explainer
~$0
Pressure-switch wiring fix
$1,800+
Compressor / system replacement