Hi, I've come across this bizarre issue and I wonder if anyone can help please.
When the engine is running and the blower fan is on (it doesn't matter if the A/C is on or off) there is a very distinct hissing noise, its very noticeable when fan is on the lowest setting.
It almost sounds like a vacuum leak - I assume nothing in regards to the HVAC on a car this late is vacuum controlled?
Thanks in advance for any info!
When the engine is running and the blower fan is on (it doesn't matter if the A/C is on or off) there is a very distinct hissing noise, its very noticeable when fan is on the lowest setting.
It almost sounds like a vacuum leak - I assume nothing in regards to the HVAC on a car this late is vacuum controlled?
Thanks in advance for any info!
