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Old 4th September 2024, 11:32 AM
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The_Laird The_Laird is offline
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Default Air Con noise

Help!

I have a very similar noise to this in my Audi TTS: https://www.youtube.com/watch?v=ym7HR6rC6Cw&t=64s

It’s only there with the air con turned on and, like in the video, it disappears when then the air con is turned off.

It seems to be coming from around the heater fan area (not under the bonnet), but the heater fan is new and you can wind that up to full with no noise (until you push the air con button!).

I’ve got the fan out, but no obviuos issues, and the noise is still there with the fan removed (but still plugged in, as the air con doesn’t work with the fan off or disconnected).

Any ideas?
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2002 Final Edition S8. Ebony black with Silver Grey leather and myrtle wood trim.
Current mods: solar sun roof, 20mm rear spacers, 15 mm on front, red brembo callipers, 6k headlights, rear view camera, engine remap, alloy dash dial rings, alloy navi rings, tt/phaeton pedal upgrade, (and custom matching foot rest) dension ipod interface & parrot hands free kit (both fully hidden), av input, tv in motion switched thro' PF switch in blanking plug right of steering column, Audi 'quattro' sill covers, repositioned centre console switches, radio clock, .
Planned mods: auto-dimming rear view mirror, dash cam (as steamship's), fit the ski hatch, refit philips drl's (or maybe not - nope, definitely not - horrible botch!).
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Old 4th September 2024, 05:12 PM
strummagnet strummagnet is offline
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Default

I had a similar noise issue but was convinced it was a whine coming from the torque converter. After only managing to top up about 125mls gearbox fluid I found the noise was still present. Turning the AC to ECON the noise went away. Transpires that although the noise was more distinguishable in the cabin it was the AC compressor (low on coolant). AC guy did say though it's probably time to plan for a new compressor as the bearings could also be on thier way out.

These cars never stay fixed
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Audi S8 2002 FE Avus Silver / Extended Red Leather. https://forum.a8parts.co.uk//showthread.php?t=16187
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Old 5th September 2024, 07:12 AM
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The_Laird The_Laird is offline
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Thanks Paul. Topping up the air con coolant was going to be my next attempt at a fix as I’ve checked the filter and all the air vents.
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2002 Final Edition S8. Ebony black with Silver Grey leather and myrtle wood trim.
Current mods: solar sun roof, 20mm rear spacers, 15 mm on front, red brembo callipers, 6k headlights, rear view camera, engine remap, alloy dash dial rings, alloy navi rings, tt/phaeton pedal upgrade, (and custom matching foot rest) dension ipod interface & parrot hands free kit (both fully hidden), av input, tv in motion switched thro' PF switch in blanking plug right of steering column, Audi 'quattro' sill covers, repositioned centre console switches, radio clock, .
Planned mods: auto-dimming rear view mirror, dash cam (as steamship's), fit the ski hatch, refit philips drl's (or maybe not - nope, definitely not - horrible botch!).
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