Heater not working on the driver's side?

9 times out of 10 the problem will be the driver's side temperature blend door actuator, here is the location so you can change it out. But here are the actuator wiring diagrams so you can check for power and ground for the motor inside the actuator.

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester


Check out the images (below). Please let us know if you need anything else to get the problem fixed.