Hot Air Blows Out From Dash In My 1991 Ls 400

[toymig]

Does anybody know why hot air blows out from the dash of a 1991 LS 400 even though the heater is not on, if so can you let me know how to fix it.

NOTE: I have been told that I might need to reset the AC breakers (done and still blows hot air). Your help is appreciated.

Thanks.

ToyMig

[Rick George]

Does anybody know why hot air blows out from the dash of a 1991 LS 400 even though the heater is not on, if so can you let me know how to fix it.

NOTE: I have been told that I might need to reset the AC breakers (done and still blows hot air). Your help is appreciated.

Thanks.

ToyMig

I have the same issue. driving 5hrs in 40degree C heat on the way back from getting the car was a killer with no A/C either.

....well not really a killer more just ball soup.....

[Rick George]

bump. any help would be good :)

[jcrome04]

It's because of the vent option.

The fan may be "OFF" but there is still some air coming through the vent.

Switch it to "Recirculate" and the air should stop alltogether! :D

[ko90ls]

when i first got my car it did this but it was winter so i didn't mind. when the summer came #@$%! but a spark plug/wire change fixed the issue.