One problem related to defogger has been reported for the 1998 Dodge Ram 1500. The most recently reported issues are listed below.
Manufacturer was aware, but did not notify consumers of possibility of bacteria and fungi growth in ac/heating system causing health concerns for the occupents of the vehicle because of fungi and mold spores emitted through the ac system. Over the last few years have had extraoridnary problems with sinus infections caused by mold spores and fungi spores being emitted without my knowledge through the ventilation system of the vehicle. Manufacturer was aware of condition, and had issued technical service bulletins about the problem, but did not notify consumers putting their/my health at risk.