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.
Hi. I have a 07 Yukon that also has heating/cooling problems.
Sometimes the driver side will blow hot air and the passenger side
will be cold (with A/C on) even though the temp settings are the same
on both sides. Other times the heating will not work. So far, I have
been able to reset this by running the temp setting for a few minutes
at maximum setting on both sides. That's not fun in the summer. Than
shutting off the engine, waiting a few minutes and then starting
On a different note, sometimes the cruise control does not set, and
even does not switch on. Stopping the vehicle, cutting off the
engine, waiting a few moments and then starting again fixes this also.
I do not know what it is, but I assume that it has to do with the
electronic control system.
Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here.
All logos and trade names are the property of their respective owners.