The previous post described a similar issue with the 1997 CR-V. After
driving with the AC on, there is a hissing noise from the engine compartment
for about 10 minutes, after wich is disappears. After I investigated, it
seames it is coming from the front of the engine compartment, around the ac
coils. There happens to be two coolant hoses too, with metallic coupling to
the ac coils. There is no smell, no coolant leak, nothing.

Could this be the same "a/c expansion valve" issue?

Thanks for any help!
Pete