Stupidly I left a spent, totally brass cartridge in the dash tray and it rolled down into the center air vent. It is at the bottom of the passenger side. Recently the little book indicator came on. So is my cartridge possibly causing a problem or what?
I don't hear a clicking sound but will listen for it. AC has never been strong or predictable so maybe the cartridge has contributed to it's marginal performance. How involved is it to get to the blending motors?