The heated seats don't heat, both driver and passenger side.

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.

Replace the fuse with one the same rating. If the seat now works.... smile. If the new fuse blows or the heat does not work you may have a short (or a broken wire) inside the seat that's causing the problem. It's an 11 year old seat.... tearing it apart to find the source may not be worth it.

I have the same problem except the back of mine works but the bottom doesn't. Passenger side is fine. Let me know what you find out if you could.

The problem could be the drivers seat module.It is under the seat and controls the drivers seat functions.There is a service bulletin for seats that will only work for a few minutes and then shut off by themselves.The fix for this is having the drivers seat module reprogrammed but I don`t know if your problem would fall in this bulletin.Only the dealerships can program these modules.Hope this helps.Good luck.

It is usually one of two problems. Either the relay under the seat has failed or the heat element in the seat has failed.

If you are not electrically challenged, you can use a simple volt-ohm meter and check for continuity in the heat element. If you have continuity, the element is good, otherwise that's your problem.

If the heat element is good, you may want to take the good relay from under the passenger seat and put it on the driver's side to see if that fixes it. If so, then you have to get a new relay.

Last, but very unlikely, would be a bad switch.

I had the same issue with my 2004 XUV on the drivers side. Noticed that a "spot" was hooter than normal right before it quit. The seat heaters are basically a simple wire coil that is laid between the upholstery and the padding. The back and seat units are independent but operate off the same switch. If you are somewhat mechanically inclined, this is not a difficult fix, you just have to be patient and careful. Mine was a year ago and I think the replacement part from GM Parts Direct was less than 50 bucks. The dealer wanted over $300 to fix it. If you want me to walk you thru it let me know.

Hi my name is Allen!

The most probable cause for your problem is the heating grid that is mounted on the set for heating it, it is under the seat cover, the light will act weird because it is not completing the circuit. Raise the seat cover and visually look at it, it should be burnt.

For further asistance you may reach me at FixYa!

The problem is most likely caused by shorted heating grids in the seat cushion itself, kind of like the heating element in an electric blanket, very expensive to replace.

bad heater core?