Greg

Faults like this that come and go are such a PITA to trace - but it does now perhaps point to a duff connector somewhere. I will shortly have similar fun and games sorting out Easy Access on my steering column which I am convinced is a loose/corroded connector somewhere. For me, that will have to wait until spring arrives next week, especially as I slipped a disc in my back yesterday

I know the seat blowers are not cheap, but at the same, it is almost better to know a part is faulty, swap it out and job done.

Let us know how you get along mate. Current Cars:
MY11 5.0 SC Stornoway - sold
MY06 TD6 Zambezi - sold
1997 BMW E36 M3 Evolution Convertible Estoril

Air flow restriction can be on the output too.
As far as I can work out the air is blown in by the fan, ciculates through the pad, and then exits near the fan again. That is, the air doesn't actually come out of the perforations. If you think about it that makes sense as most of them will be covered up when you sit on the seat.

I have tested the unit you sent me with a meter and there are no shorts or open circuits. All values look OK although not all are in the quoted ranges.
Next step is to test the peltier for heating, and temp sensor (job for tomorrow night) Too many toys, not enough time

2011 4.4 TDV8 AB Black

A minor update on my flakey seat base heater. I've been trying again to remove it from under the seat and then I found an image of the part

Click image to enlarge

Greg,
Has your copy of the WM got info in each of the following PDF’s ?

Click image to enlarge

Click image to enlarge

Hi Mike, yes same - empty data pages for those items. The picture you posted is all I have too.
Sounds like we have the same version...
Greg Cheers, Greg
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2011 Vogue SE 4.4 with lots of toys in Stornaway

mike/greg, change the file extensions to 'pdf'...  ... - .- -.




Y. O. L. O.
.

WOW thanks Stan!
I've got some reading to do now.
. Cheers, Greg
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2011 Vogue SE 4.4 with lots of toys in Stornaway

Greg,
Do you know how to make the change to PDF on an iPad?

I rarely use my PC laptop these days because it is very old and so slow, I think the job of getting the WM from Topix was the straw that broke the camels back.

Cheers
Mike. G reg 2.5VM Vogue Portofino red 1991- 1999
V reg 2.5td P38 Rioja red 1999- 2006
53 reg td6 Vogue Oslo blue 2006- 2015
11 reg 4.4 TdV8 Vogue SE. Baltic blue 2015- date.
https://www.fullfatrr.com/forum/topic56162...tty+affair

PM'd you Mike

. Cheers, Greg
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2011 Vogue SE 4.4 with lots of toys in Stornaway

Thanks to Stan & Greg.  G reg 2.5VM Vogue Portofino red 1991- 1999
V reg 2.5td P38 Rioja red 1999- 2006
53 reg td6 Vogue Oslo blue 2006- 2015
11 reg 4.4 TdV8 Vogue SE. Baltic blue 2015- date.
https://www.fullfatrr.com/forum/topic56162...tty+affair

Hi guys,
Sorry for the delay in replying. Work is manic and it's not much better at home !

Greg, the copper bits you point to above are the radiator fins attached to the peltier junction.
The fan blows air across both sides of the peltier. The peltier transfers heat from one side to the other, and the direction depends on the polarity applied.

One side of the moulding directs air into the seat Base. The other side vents out below the seat.
I am unclear where the air blown into the cushion actually exits.

So Greg, I think what you need to do is disconnect the unit from your seat Base but keep it still electrically connected. Then turn the seat heating on and see firstly if it blows out hot air from the seat side of the moulding, and secondly whether you then get the overtemperature warning.

I don't think there is an additional sensor related to seat heating in the cushion. The only sensor I can see is for occupancy,to enable seat belt and airbag.

I have partially tested the unit you sent me.
The fan works fine, and the peltier does heat up.
The temp sensor on the peltier also changes value but I need to figure out if it's doing so correctly.

I am away for the next 2 weekends so will get back on it then

One thing to be aware of. Don't be tempted to stick 12v across the peltier !
The module uses a lower voltage to control it which looks to be about 6v. Too many toys, not enough time

2011 4.4 TDV8 AB Black

Last edited by John w on 12th Apr 2018 12:28pm. Edited 1 time in total

Cheers John, I'll give that a try.
Need to do a major seat teardown anyway just to get that out.

Interesting findings on your tests so far too.
. Cheers, Greg
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2011 Vogue SE 4.4 with lots of toys in Stornaway

This is worth a read

https://www.rangerovers.net/forum/6-range-...fan-2.html

Are we ok to link to the 'other' site Stan? I guess I'll find out....!
It's circular and when your read right through to the end it points back to this thread!

Still need to do a full seat take-apart. Funny how a heated seat is no longer a priority job!
. Cheers, Greg
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2011 Vogue SE 4.4 with lots of toys in Stornaway

My theory is, that the peltier is actually working in your case, and heating up.
The temp sensor is sensing that it is getting too hot due to lack of sufficient air flow.

In the linked page, and info posted back on page 2 of this thread, the problem there was the ducting having a hole in it, so the air was escaping and not going through the peltier.

That is why I suggested disconnecting the oval bit from the seat Base and trying it.
I would expect it will then work correctly, or not throw a fault code.
You could also set the seat to max cold and see if it actually chills the seat Base. The leather gets noticeably cool to the touch. Too many toys, not enough time

2011 4.4 TDV8 AB Black

Ran across this while looking up problems with my seats. With 157k miles I expect the filters are filthy. The passenger seat still works, but the drivers doesn't seem to heat or cool. I expect it needs a new unit. I'll start with filter first though. A lot of the Ford owners are buying the RR filters because it still has the filter media in it. I'm actually ordering the Ford FS-106 for better airflow. Found the FS for a little cheaper than the RR filter. Does anyone know if the F150 fan unit is a direct replacement for the RR unit if it is bad?