The "INT" (interval) windshield wiper setting not working.

Hello, it is likely that the switch has developed a problem internally, now allowing those settings to work. This is of course an educated guess, and it would require proper testing to determine the absolute cause of the problem. For a shop near you that can help, check with a shop on this list: http://repairpal.com/honda-within-10-miles-of-buna-texas-77612