One problem related to defogger has been reported for the 1998 Mitsubishi Diamante. The most recently reported issues are listed below.
Everytime the heater is switched on, I can feel a weird smell which will last for about 10 mins. This smell seems like suffocating and have to open the windows for the fresh air to enter. There is some kind of leak in the engine compartment, I am not sure where the leak is from. I am bit worried abt the smell. Thanks.