Check fuses first. If they are ok then check for power at the blower motor. If you have battery voltage at the connector then you have a bad blower.
If you need to find a shop, use this link.
https://repairpal.com/repair-shops
Alex
RepairPal Certified shops can diagnose and repair your 2002 Nissan Quest. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.