I am going throught the same issue as we speak. I told the dealer what "we" on the forum had found the fix to be the IC pump failure and of course they said they had to check it out themselves. Well, after a couple of tries replaceing everything EXCEPT the pump as I ask them to, They have now ordered the pump and are as nice and pleasent as can be. I'm confident the pump will resolve the problem and the dealer will realize they don't have all the answers.