On Feb 16, 12:50 am, "techman41...@yahoo.com" <techman41...@yahoo.com>
wrote:
> I have a 97 Accord with a bit over 200K.
> For the past 20K or so, I hear an intermittent hissing sound below the
> glove box when the AC switch is activated. Cooling seems to work fine,
> verified this summer in the scorching heat of the southwest. Other
> than being quite annoying, I am wondering if this is a clue that
> something is about to fail.
> Thanks

The area behind the glove box is right where the A/C expansion valve
resides on your Accord. You are just hearing the sound of refrigerant
changing states from liquid to gas through the expansion valve (it is
a designed-in restriction). IOW, it's normal. If the A/C system
wasn't cooling properly in high temps and the refrigerant charge was
full, then an excessive hissing noise near the glove box would lead me
to believe that the expansion valve was stuck closed - also verifiable
with pressure gauges. You have proven that this is not an issue by
stating that you have adequate cooling in high temp weather.

Toyota MDT in MO