Cooled seats not cooling

[FeedtheNeed]

So does the fan blow air across both sides of the heat exchanger, or is the the heatsink purely passive?

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[Darko66]

It blows across both like it should, but all the hot air is trapped, so the cold air flex tube gets encircled with it.

 

[FeedtheNeed]

It blows across both like it should, but all the hot air is trapped, so the cold air flex tube gets encircled with it.

I know that is what it appears from the pictures, I was curious if that was actually the case.

I suspect it is also not getting sufficient airflow, in addition to everything else.

 

[mike62]

Is ford going to have a recall?


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[PonyGrrrl]

I don't think it will be a recall because it's not safety related. Hopefully we'll see a TSB issued.


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[RubyRed15]

The redesign for this is not even hard. All they have to do is walk down the hall to the Taurus design group and copy that design. They work beautifully.

 

[jkstang78]

After seeing this thread and just getting my car a couple of weeks ago. I noticed the same thing with my seats. Seat bottoms are cool and the backs are on the warm side. I even turned on the passenger seat and noticed the same thing.

 

[Free Agent]

I am interested in what exactly Ford will do or suggest if a tsb is issued.

 

[tsunami]

I am sure that an upgrade for the heated/cooled seats will be available in the 2017, 2018 or 2019 models along with collision braking, lane change warning, etc.

 

[GT Pony]

If you look back at the original images Droid Junky took up inside the seat, you'll see that the flexible duct goes to the seat and isn't the exhaust outlet. The heat just comes out directly from the other opening next to the duct. This is different than the units used on other fords that have the two outlets at 90° from each other with the cold side plugging directly into the seat (no flex tube) and the hot side vented off via tubing.

This is how I think the cool and warm air flows on the seat back units. One thing that probably happens that I didn't get quite right back when I posted (link below) is that the fan probably blows across both the cool and warm sides of the unit instead of the reject heat just rising from natural convection.

http://www.mustang6g.com/forums/showpost.php?p=634824&postcount=171

 

[Droid_Junky]

FeedTheNeed, here is the info I promised about a week ago for you to update the initial post. I never got around to it and remembered today after realizing my mod was no longer working. The seatbacks still get hot enough for the duct tape to peel right off! I'm about to order some plastic sheets from Amazon and see how good I am and cutting and shaping it to a box that can be held onto those screws.

Feel free to edit as needed. There might be some other pictures that should be added.

---------------------------

YES, THE SEATBACKS ARE SUPPOSE TO COOL JUST AS THE BOTTOM CUSHION COOLS. THE SEATBACK DOESN'T COOL BECAUSE OF A POOR DESIGN.

While investigating the issue we have learned that the issue with the seatback is that the inlet fan is forced to recirculate the air from within the back of the seat because it has no way of getting air from the cabin. The bottom cushion that works quite well does have access to cabin air.

(pic of Peltier device outside the seatback producing cooled air for over 30 minutes with no signs of warming)

The seats are cooled and heated by a Peltier device. The inlet fan blows air across the two plates of the Peltier device. One side of the device is cooled while the other side produces exhaust heat. The fan does blow across each side at the same time. What is supposed to happen is the cooled air is pushed through the rubber duct to the perforations of the seat. The exhaust side blows hot air inside the back of the seat and based on the way it is currently designed, it is expected that the hot air escapes out the back perforations of the seat. It seems that most of the exhaust heat remains trapped in the back of the seat. This hot air is recirculated through the Peltier device and significantly reduces the cooled air side. There are several reports that the seatback actually begins to increase in temperature.

(pic of Peltier device installed. Cooled air should flows through rubber duct (blue lines), hot exhaust out the back(red lines))

THERE IS ALSO THE QUESTION OF WHERE ON THE SEATBACK SHOULD WE FILL COOL AIR?

This can be answered by testing the heating option of the seat. If you turn the heat on to the seat you can feel every part of the seat that gets warm. Technically this same area that is warmed by the heat option, should also feel cooled with the cooled option. We have verified that during normal heated seat operation, the heat that is felt on the seats is produced from the same Peltier device. The air blows through the same perforations of the seat. This option works very well.

A temporary duct was tested on the device to allow air from the cabin and the results were promising. The seat feels cools for the first time this summer. This failed after two weeks because the heat is still too much for the duct tape to hold!!! WE NEED A PERMANENT SOLUTION FROM FORD!

(other pics of the device and wiring)

 

[FeedtheNeed]

Got the initial post updated.

Droid_Junky, have you put any thought into combining your "cold air intake" with any forced air over the heat sink?

I think a combination of the two would yield some impressive results.

The same could probably be done on the bottom to improve time until cooling when it is super hot out.

 

[GT Pony]

Droid_Junky, have you put any thought into combining your "cold air intake" with any forced air over the heat sink?

The air may already be forced over both the cool and warm sides of the heat sink. If someone could run a unit outside the seat (I think Droid_Junky already did that), one could simply feel if there is air flow coming out of the rejected heat port (red arrows in the photo link below).

http://www.mustang6g.com/forums/attachment.php?attachmentid=34255&d=1436492049

Based on the shape of the main flow duct between the fan and the cooling/heating unit, I'd say the fan blows air past both the cool and warm side of the unit. Look at that main duct where it would enter the cool/warm heat sink area. Seems to me air would be blown past both sides.

http://www.mustang6g.com/forums/attachment.php?attachmentid=34256&d=1436492049

 

[Darko66]

Yes the fan blows across the hot side as well.

At least on mine it pumps out quite a bit of hot air.

 

[Droid_Junky]

^yes the air blows across both sides at the same time. The air is cooler out the exhaust while not in the seat.

The air was also cooler out the exhaust when I had the mod installed.

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