hi i am currently freezing my ass off every morning down to my motor only producing luke warm air been going to work sitting on my hands with the heated seats on ,there is no way i am forkin shed loads of money for a new matrix but thought as it is luke warm it might only need to be flushed out just wanted to know if anyone has had the same prob and flushed it through was it hard to do and did it make a difference greatfull for any feedback