[Adam Juarez]

I know this is an old topi, but did anyone ever find out what was making the whining noise? My son’s 1997 Honda Civic EX is making a whining noise when the A/C is on and it is coming from behind the glove box.
I’m thinking it might be the expansion valve restricting the refrigerant, but don’t know for sure. All of the A/C components were replaced before this happened minus the A/C refrigerant lines. I wonder if a flush was ever done on the vehicle. Do expansion valves typically make a whining noise when they are starting to fail?
Any help will be appreciated.

Thanks!

[Author]

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