White smoke From Vent

I have a 1990 honda civic lx 160k miles
The only problem is heater core leaks so I bypassed the problem.
After 10 mins of AC blowing, white smoke appears yet the AC still is
cold.
Should I roll down the window? Could it be some gas?
I "google"ed the problem on it but all i found was tail pipe smoke.

 

If your AC is really cold, and it's very warm in the car, the white
"smoke" may just be condensation from humidity.... cold air hitting
warm moist air, just like fog. Is there a build up of smoke in the
car or does is seem to dissipate immediately? If it dissipates
immediately and has no odour, it's likely just condensation. As best
as I know, there is nothing in the air stream from the outside through
the heater core to the car interior, that would produce white smoke.

 

Simple condensation.

SD

 

Check the condensation drain tube from the evaporator is open and draining.

 

Is it possible that the system uses a little heat from the heater core
to prevent/reduce condensation? Normally this is just a slight
annoyance on very humid days. Does the OP live in the Philippines?

 

Unlikely. The system has no idea if there's steam blowing from the vents.
All it knows to do is keep the evaporator from clogging solid with ice by
cycling the temperature around 32F.

If any A/C system knew how to eliminate condensation, nobody would ever
have that dirty-gym-sock odor from his A/C, which we know is NOT the
case...

 

So my AC blows so cold that it is condensation?
My only problem is that my AC works too well?
Irony
Thanks for the help.

 

You are a little bit low on refrigerant. The reason you see fog, is
the
coil temp is too low, and starts to freeze up. If you charge up to
normal level, the coil temp rises, and viola, no more fog..
In the hot summer, you will find your a/c ain't working quite as
well as you thought it was.
MK

 

I wasn't thinking of a smart system, just a little heat applied to the
air after it's been wrung out.