Hello, my wife's 2006 equinox heater just quit working. Very little to no heat comes out no matter what heat setting we use. Thermostat is ok ,fan works fine, AC works fine, just no heat. Checked the fuse it's ok. Is there an electronic switch or solinoid that controls a valve?? tried to buy a repair manual nobody seems to carry them. anybody ever try the electronic program manuals out there? that seems to be the only manual i can find. Take alook at this site if you have the sam problem

http://chevroletforum.com/forum/showthread.php?t=10683
http://www.topix.com/forum/autos/chevrolet-equinox/TNMHVCTE76U9HGTH4/p2

thanks