Sounds like an issue with the climate control controls themselves. Hands on testing is required, but your symptoms sound related.
Use this link to find some shops near you that can help with your concern:
www.repairpal.com/repair-shops
RepairPal Certified shops can diagnose and repair your 2004 Acura TL. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.