Why can't heated seat on drivers side be turned off?

The heated seats are a luxury feature that heat the front seats. This provides maximum comfort for the driver and the front passenger. To turn on the heated seats, press the heated seat button, which is a picture of a seat. There are two of these buttons, and each are located on the center console. The button on the driver's side of the console controls the heat for the driver's seat, while the button on the passenger's side of the center console controls the heat for the passenger's seat. Pressing the heated seat button will turn the heated-seats onto their highest setting. Pressing the button a second time will lower the heated seats to their medium setting. Pressing the button a third time will result in the lowest setting. Pressing the button a fourth time will turn off the heated seats. There are three lights next to the heated seat buttons to indicate what setting the heated seats are on.
Tip
The heated seats will only work when the engine is running.

The most common cause of this problem is that the drivers seat heater grid is open or burned out. That is based on 25 years as a Ford dealer technician.

CHEVY GMC SEAT HEATER TROUBLESHOOTING

try swopping the feed wires around and run the passenger one over to teh drivers side

you have a couple of problems first of all your drivers sd=ide heated heat pad is probably faulty, for your heating problem you may have to get the hvac doors recalibrated.

The body control module in this vehicle sees a short in the seat heater system. These vehiucles are typical of the heater wiring shorting out. When you try to use the bad heater the computer shuts off all the heaters.

You will need to install a new seat heater pad.

Identical thing here with my '03 Surburban LT.

check the rail system on the seat. sometimes it pulls the wire out and it doesn't get good enough connection

check under seat fof broken or unplugged wires

The most likely failure point is the driver heated seat elements. They probably have excessive resistance and once they warm up a little they short out the module and it defaults to not working. I would recommend replacing both upper and lower driver seat elements.