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You need to start out by checking the a/c-heater controller and the a/c-heater doors behind the dash for proper operation..............
have a trim shop replce the elements they allways break
If the passenger side works but the driver side doesn't, the linkage under the arm is broken.
Could be just the switch (the button you push). To check, pop the center portion of the coin holder between the driver and passenger side seat heater switches. On both opposing short sides of the switch there is a clip that need to be pried open to allow the switch off of the harness. Just swap the good switch over and if it works, order a new switch.
The heater temperature sensor is probably disconnected. The ground wire is either loose or not connected at all. The sensor may need to be replaced.
The heater resistor pack is bad. Replace it. A Blower Motor Resistor burned down and needs to be replaced. It costs about $37 from the dealer and is located on the passenger side underneath the dashboard. It is held there by 2 screws and very easy to change. Common problem with Nissan cars.
Need to replace both head lights. The high beem is burned out on one side and the low beem burned out on the other side.
If the driver's side works it is probably a broken linkage or wiper transmission problem not a fuse
One is for ac which works when you have ac on, other is auto which works when the radiator heats up.
Try Blower Motor Resistor. It would on the Passenger side under the dash
I had a similar issue occur with my Acura TL. According to the dealership the fillament on the driver seat went bad while the one on the passenger seat was still functional.
When i disconnect my battery and reconnect it and then turned my heat on it works for a minute. And then it seems like it makes heat on the driver side and air-conditioning on the passenger side. It has climate control for the passenger.