2003 Honda Odyssey A/C Hissing

2003 HONDA ODYSSEY
150,000 MILES • 6 CYL • FWD • AUTOMATIC
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DREDDAWAY
  • MEMBER
  • 1 POST
There is a loud hissing noise throughout the cabin which I believe is plumbing for the A/C unit. When turning A/C off, the noise goes away. Curious to know what has failed and how to fix.
Nov 8, 2009 at 11:43 PM
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KHLOW2008
  • ✓Experienced Mechanic
  • 41,812 POSTS
Hi dreddaway,

If the noise is pressure like hissing noise, most probably it is caused by the expansion valve and to replace it you would need to discharge the ac system and remove the cooling coil.
This should be done by qualified AC personnels with proper equipments.
Nov 11, 2009 at 6:27 AM
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