I've been living with this issue for 15 years and now I am determined to resolve it, if possible with your help
Essentially, when the heat control knob is turned to the min. it makes a tic tic noise, in order to get rid of it, I have to slightly increase it.
I remember at the beginning of 2000 a Volvo dealer told me that is was better to leave it as it is as it was not easy to resolve, but I do not remember the explanation they provided to me or perhaps they did not... honestly I do not know.
Anyhow, I just recorder this short video in order to let you hear what I mean (I do apologize for the video sponsor at beginning/end of the video, I used a freeware software).
http://www.mediafire.com/file/64en9bxh74nd4dn/Heat_Control.mp4
I really hope some of you knows what this is all about.
Thank you!
Alex