I've been having a problem with my heater just recently. No air(hot or cold) comes out of the vents until i drive the car for awhile, about 20-30 minutes. Then it starts working, everything works fine, heater blows hot. THis is getting annoying because its cold out and the windshield keeps fogging up. Any ideas what could be wrong? Car is a 92 integra.

 

check the level of your coolant. if you're low on coolant, there wont be enough to circulate into the heater core, causing cold air to blow out.

 

^^^Neither cold nor hot air is coming out though...

 

Is you blower motor broke or faulty?

 

I dont think so because after I get the car running for about 30 minutes, everything starts working again.