On Feb 16, 2:25 pm, Don <d...@NO-SPAMdonsautomotive.com> wrote:
> On 16 Feb 2007 10:26:45 -0800, "Comboverfish" <comboverf...@yahoo.com>
> wrote:
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> >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
>
> We recently replaced a compressor, drier and expansion valve on a
> Honda CRV. Had to warranty the damn expansion valve because it made a
> piercing whistle! All the while cooling just fine. Thank the good
> lord Jap evaporator boxes come out in 20 minutes as opposed to 6-10
> hours like on some domestic vehicles.
>
> Donwww.donsautomotive.com

Apparently the Japanese have a different lord when it comes to under
dash service. Was this a Nippon Denso or Honda OEM TXV ... or an
aftermarket unit?

Toyota MDT in MO