Z3 Heated Seats getting far too hot!

GazHyde

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M Power
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Location
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Model of Z
Z4 MR
As part of @BMBabe's Project Panther we have an interesting issue with the heated seats - primarily the drivers.

It gets almost hot enough to burn skin, so we are figuring something isn't exactly right. It has the same style sport seats as I have in mine, and those don't get anywhere near that hot - just nice and comfy.

Not really sure where to start looking on this. I'm assuming there must be an obvious place to start looking on this issue.
 
I would not know Gaz as I do not have heated seats.
This any help?
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On which setting does it get too hot '1' or '2'?
Depending in what you wearing 2 can feel very hot but it switches down to 1 after a set period of time....but being a Z owner and occasional forum browser you probably know that already...!!


Just a thought: Have the seats been recovered- perhaps the the foam lining on the underside of the leather is not the there or different leather used (not sure if it would make much difference though).
 
A couple of things you could try:-
  • To rule out a switch issue swap the switches over, if the drivers seat still gets too hot then you know it's a seat issue, if the passenger seat suddenly gets too hot it is a switch issue.
  • If it turns out to be a seat issue, measure the resistance of the heater elements and compare side to side.
Did I mention that you may have an issue ;)
 
If he can't work it out he may need some tissues?:) TB H mine does get fairly warm on the hotter setting but once the second setting comes in it's ok. My Touareg has 5 positions and very soft leather seats and even on a cold day no. 5 is soon too hot.

Tony.
 
Best get a frypan, could be handy for cooking breakfasts when out on one of your cruises!!!!;)

Seriously, make sure the thermostats are working properly!

Mike
 
On the drive home after collecting @BMBabe's car i put both heated seats on. @pgunter was passenger and to his amusement he saw me start jumping around after a few minutes because it was burning my "Ass"

Test one - (thanks to @Brian H) I will swap both switchs

Test two - check the eliments resistance (Fluke Meter in my garage)

Test three - Get @GazHyde to sit on the seat for each test
 
How does the saying go?
I once complained that my seats were to hot until I met a man that had non at all.
Something along those lines LOL :)
 
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