Heater is blowing hot air from vents on drivers side of vehicle but takes forever to get warm on right side. Doesn't ever get as warm as left side

You could be having an issue with a blend door actuator. These are little motors behind the dash that direct airflow. This will require some electrical testing and some dissasmebly of the dash. If you need a shop, here is a link to find one near you. https://repairpal.com/repair-shopsAlex