[s-cars] Re: Chirping sound from HVAC fan?

[Bill Noland]

The chirping sound may not be due to a bad blower motor. The UrS cars have a 
very small fan that draws in air from the cabin for climate control 
temperature regulation. It lives below the tiny vent in the middle of the 
top of the dashboard. Next time the squealing starts, try placing your 
thumb, or any available digit, over the mini-vent and see if the squealing 
quiets down.

If the small climate control fan is the culprit, you can dig into the dash 
and replace it, or try waiting it out. Squealing was intermittent on my UrS4 
for a few weeks, then stopped on its own (that was 3-4 years ago and has 
been quiet since). My guess is, that little bits of dirt/dust/assorted crap 
fall down the vent and set off the squeal. Said dirt/dust/assorted crap 
eventually work their way out and squealing stops. Might try blowing some 
compressed air down the vent.

Bill Noland

> My dash has developed an  intermittent chirping sound, quits when I shut 
> the fan off completely.  Does not seem to matter what speed I have my fan 
> on, the chirp is there, but it does come and go from day to day.  Anyone 
> have any thoughts .... unlike Tom Cruise .. "I can handle the truth".