Hello, I have an 07 malibu Maxx SS which seems to have developed a problem with the heating/cooling system. When the car is first started, once the coolant temp starts to rise the heating system works fine. However, at the point that the car is fully warmed up, the temp can't be controlled: it blows cold air (even with the A/C switch off), unless the temp is turned up to about 85 degrees at which point it blows hot air. The car has been sitting at the dealer's for two days now and they say they can't figure out the problem. They know there's a problem but can't isolate it. Do any of you have some ideas? I'd like to be able to tell them by tomorrow so they can really get to work and fix or replace whatever needs fixing.. thanks in advance.
- posted
15 years ago