Ford and Volkswagen MPV Forums

Large MPVs -- Ford Galaxy / VW Sharan / SEAT Alhambra: => Ford Galaxy / VW Sharan / SEAT Alhambra => Topic started by: alexk on June 28, 2013, 03:46:02 PM

Title: hissing from air con/centre vent area galaxy mk1 td
Post by: alexk on June 28, 2013, 03:46:02 PM
Hello, I have recently bought a 1998 galaxy td glx 87bhp. When the engine is running there is a constant hissing noise coming from the central vent area or behind the heating control panel. It is regardless of whether air con is on or off. Any ideas?
Title: Re: hissing from air con/centre vent area galaxy mk1 td
Post by: Mirez on June 28, 2013, 06:08:24 PM
And if you turn the ventilation system off entirely?
Title: Re: hissing from air con/centre vent area galaxy mk1 td
Post by: alexk on June 28, 2013, 08:33:45 PM
Yes, this hissing is there all the time regardless of whether the blower is on or off or whether the recycled air is on or off.
Title: Re: hissing from air con/centre vent area galaxy mk1 td
Post by: Mirez on June 28, 2013, 09:15:58 PM
Probably not to do with the HVAC system then -

If its a diesel then IIRC there is a vacuum pipe right behind the console for boost pressure
If its a petrol then has it got cruise? The cruise system is all vacuum on petrols so good also be leaking.
Title: Re: hissing from air con/centre vent area galaxy mk1 td
Post by: alexk on June 28, 2013, 09:55:57 PM
It's a diesel td 87bhp. What does IIRC mean? And do you think the vacuum pipe is likely to be leaking then?
Title: Re: hissing from air con/centre vent area galaxy mk1 td
Post by: gregers on June 28, 2013, 11:45:44 PM
iirc=if i remember correctly  ;)
Title: Re: hissing from air con/centre vent area galaxy mk1 td
Post by: alexk on June 29, 2013, 07:45:07 AM
Oh...ok. Live and learn  :). Will check the boost pipes and report back
Title: Re: hissing from air con/centre vent area galaxy mk1 td
Post by: alexk on July 02, 2013, 08:12:13 PM
How do you get behind the control panel anyone please?
Title: Re: hissing from air con/centre vent area galaxy mk1 td
Post by: Mirez on July 03, 2013, 11:46:47 PM
The instrument cluster?