Hey oppo, question for you guys. The heat in my car works, but seemingly random it blows out cold air for a while. Normally this wouldn’t bother me, but I have a three year old and a three month old; I’d like to keep them warm.

My car is a ‘07 Pontiac Grand Prix, and the thermostat was changed in the past few months. I talked to a mechanic friend, he said there is probably air in the cooling system. I just wanted to cover all my bases and ask oppo for their opinion as well.

It seems that the car doesn’t blow cold air when I first start it up; nor can I find any rhyme or reason to anything that makes the cold air start to blow. I’ve played with it for a while, and the hot air just comes back on when it does. Nothing seems to set it back on.

Currently, I’m thinking I need to bleed the air out of the system. If that’s what I need to do; is there anything I should know before I start? Thanks in advance.