[lillia]

I'm glad you posted this guide, as I may have to do a little investigation of my own. You mentioned the smell that disappeared after the filter had been changed. I got a slight musty smell a couple of weeks ago and immediately thought of the pollen filter (the smell vanished after the A/C was run at nearly full blast for a few days, but came back today). However, the invoice from the service in March clearly states that the pollen filter was replaced. But now that someone else has mentioned that his had not been touched during a service, I think a personal inspection would be in order. I am sure it would take me way more than an hour though!