One problem related to blower has been reported for the 1998 Toyota Avalon. The most recently reported issues are listed below.
On a 98 Toyota Avalon xls: the a/c and heating system shuts down completely occasionally. The front and rear defoggers fail also. When the shut down occurs, the air vents emit very hot air, even though the thermostat is set for a/c. I almost had an accident when it started raining and the defoggers failed to operate. It appears to be an electrical wiring defect for which I have appealed to Toyota to take responsibility,but without any success.