Ecoboost77

EDIT: Update:


Driver seat HEAT or COOL function not working. Dash light illuminates and stays on but driver seat doesn't warm up or cool off. Any ideas what it could be?

Adobe2X

Do the seat fans operate when heated? I don't think that mine do on our 2012 Lariat--- only on the cool function can I hear any fan noise.

Killav-TT

I think the fans work differently in heating mode. I can hear mine on occasion, but it is not constant, and it is a very low fan speed. Mine come on for a few seconds at a time but I think it is after the seat warms up a bit. I can't hear it if the radio is up at all or I am moving down the road. Have to be stationary with the windows up and no radio on. Then I can hear a slight whir under the seats for a few seconds, then nothing again for a while.

Ecoboost77

EDIT:
See update below

Stewy604

Try re-positioning the seat, perhaps you've got a pinched wire. I would also check the connections under the seat, and perhaps re-seat them...could be a loose wire. Start with the simple things. If it turns on briefly, then shuts off, its not a fuse....but might be a relay issue. Same problem exists if you try the "cooling" option?

Ecoboost77

UPDATE***
So I was wrong about the fans. The seat fans only kick on for a few seconds in HEAT mode and turn off. This is how they are supposed to work. I tested everything last night and the passenger seat is working in HEAT and COOL perfectly.
The Driver seat though...NOTHING works. No HEAT or COOL. The switch on the dash stays illuminated, but the seat doesn't get warm or cool.


I checked under the seat for a pinched or cut wire and found nothing. Everything looked good.


SO now that ive provided a better detail, does anyone know what would cause the driver seat to not operate HEAT or COOL? It cant be the heat element because then the COOL feature would work. I assume it cant be a fuse because the passenger seat wouldn't work. Does each seat have its own relay or fuse possibly?

Scarlet

I took a look at my owners manual. This was all I found. In the passenger compartment fuse panel there is a fuse for the Heated seats. #33, 10A fuse. In the High current compartment under the hood is #69, 30A cartridge fuse - Passenger Heated/Cooled seats. It also says that #3 is a Blower motor relay, #14 says 30A-Passenger power seat, #51 says 40A-Blower motor relay power. Not sure if any of that will help.
That's all I could find. From what I understand, the seats have heating elements that work independently of the cooling. I believe each seat has it's own fan that picks up cool air from the duct going thru the console to the rear registers in the back of the console. You only get cold air to the seat when the A/C is running, otherwise it just blows whatever the ambient temperature is.

Ecoboost77

I had already checked the all of the fuses under the hood but forgot about the inside panel. I checked #33 and its still good. I think at this point its a mystery. I guess im going to just take it in for repair when I get the time after the holidays.


Thanks everyone for the help, especially Scarlet for going the extra mile.

Nate Pierson

Any update? I'm having a similar issue with my seat

itguy08

Bumpy for an update. My driver's seat will occasionally do this too. Push the heat button and the lights light up but you never hear the relay click from the passenger side. Neither heat or cool will work. Start/stop the truck and it will work fine. Totally random.

Press the passenger button and you hear the click... I'm wondering if the module is going south or the relay?