2005 Chevrolet Malibu Q&A
2005 Chevrolet Malibu Question: Heater blows cold
Generally flushing the coolant will not help you with this problem, but with 100,000 miles, you could have a blocked heater core, which would cause this problem. It may also be an issue with the climate control system air flow controls. You will need to get it inspected to know what is causing the problem for sure. Best of luck, let us know what you find! - Bret Bodas
Larry, Your reply to the answer given to your question is what helped me. I did what your repair guy did. It took a couple of days trying this technique and it finally worked! Thanks for the info. It saved us a huge headache and repair bill. Little Sister - Visitor
on a 1997 chevy malibu?