08 m35 S heated seat not working

[hiluxrunner]

I am a new Infiniti owner and i have an issue with the driver s side seat not working for heat. Seems to work for cold just not hot. The light will come on but go back off after about 1 minute. I can hear the fan but still the light goes out. I have removed the filters and they are clean and also spun the fan to make sure it was working. Not sure what else to check here or what parts to swap to test. Any help is appreciated.

[Infinity_818]

I would check the fuse if I was you. Good luck

[hiluxrunner]

Is there a seperate fuse for cooling and heating. The cooling settings seems to work just fine. If so where is the heated fuse located.

[svard75]

Definitely not a fuse. The entire system is powered with two fuses for both cooling and heating fuse 42 is a 15a for the drivers side seat, 41 is a 15a for the passenger side seat. Both provide power to the seats through a relay. So basically car battery to relay to climate control units. There is one fuse which supplies power to the actual relay and that is a inside fuse #12 a 10a fuse. Since you mentioned both seats have power this is not the source of your issue.

The heating/cooling unit in climate controlled seats is actually a TED (Thermo Electric Device) device. Two ends where one side provides heat when powered while the other side provides cool when powered. These devices are powered by the climate control seat control unit. Does this occur when you leave it on cool for a time? There is a sensor which according to the FSM SE for 2008 M35 prevents the system from working for extended periods of time if it detects 20C/68F differences in temperature between the seat cushion and the TED. To reset this turn the car off and back on again.

[hiluxrunner]

The time period is approx 5-10 mins for testing the cooling function of the seats and that is about as long as i tested them since its winter. Then i switch over to heated seats, light comes on and in less than 1 minute the light goes off. I could swap parts from the passenger seat but not sure what module to swap and also want to avoid unplugging anything that would communicate with the airbags.

[svard75]

Yeah these kinds of issues are generally dealt with by replacing parts one by one until the issue goes away. I know it's fairly basic but try swapping switches between the two seats as a starter.

[hiluxrunner]

ok will do and report back

[Mrmarcus26]

I have that same issue with my driver side. I don't know what to do

[rstylez]

i have the same problem with my 07 m45
fuse and relays are fine. i talked to a buddy of mine that runs an independent shop and he looked up in his system that there is a heating element that is supposed to be replaced at every major service interval. now that i am at 122k I believe the "stealership" service dept doesn't do this at those intervals. If anyone knows how to change this part please post up instructions. I am looking into ordering the part and doing it myself.