98 mystique blows cool & hot air out defrost vent only, is there a check valve or something and where is it located, how do I check my vacuum hoses for a leak? I have a repair manual but the check valve, if that's what it is is really unclear on the locate. Just like to know how to check vacuum lines for leaks and what if it's not a bad line, where's the check valve located inside by the heater core or under the hood some where? I have a manual but it's not real clear? Or is it something total different? Thanks again! HUTCH
Apr 9, 2012 at 12:00 AM