Daten für PTC-Zuheizer vom VW Phaeton gesucht. | Posts 32+

guste100 wrote:

My guess: Reversed polarity.

I went to Ibiza after the SLP conference.

The part you have is, according to the part number, for the rear footwell heater in the Phaeton, manufactured from 2002 to the present (one for the left side and one for the right side).

And that component is directly connected to the battery. There's nothing else in between except fuses and cables. So, it's not normal for that thing to heat up constantly. Even if the control wire is not connected. Otherwise, when expanding the Climatronic control unit, both heating elements would be active, which would quickly drain the battery.

Are you absolutely sure you connected pin 1 to the negative terminal and pin 2 to the positive terminal?


Another point: This component is protected by a 30A fuse, but the wiring before the fuse is only 2.5mm². Therefore, based on my assessment, it should only be able to handle a continuous current of around 20A, which corresponds to approximately 250 watts. You can't expect much more than a gentle breeze.

For comparison:
A) A parking heater typically provides about 5000 watts of power.
B) The PTC element in the Passat 3C is protected with a 100A fuse and wired with 16mm² cable.

Please keep us updated, as the project could also be of interest to others, since even the list price for the item is just under €150 (and that already includes the extra high Phaeton surcharge ).

Regards,
Guste.

guste100 wrote:

Another side note: This component is protected by a 30A fuse, but the wiring before the fuse is only 2.5mm². Therefore, based on my assessment, it should only be able to handle a continuous current of around 20A, which corresponds to approximately 250 watts. You can't expect much more than a gentle breeze.

Well, I have a : so, half of a Lupo's interior. You don't need to heat it much to get that little bit warm.

I tried it out once, and put a regular household fan behind it. It was quite pleasant. If I then install two more, it should (hopefully ) be enough.

Learning by Doing I will definitely report back on whether or not it worked.

Okay, here's the final report:

It failed because I have a climate control system, and therefore there's simply no space in the heating duct where I could install the PTC elements. I actually wanted to cut two holes in the heating duct directly after the fan and install them there. Unfortunately, the evaporator is already located there. After the evaporator, the heating duct is then oddly curved. So, it's not possible there either. Maybe it would work if you removed the dashboard, but that's only a possibility! It looks like we'll probably end up with an expensive, high-maintenance auxiliary heater after all; it's just the more elegant solution.

TDI-GTI-4-Motion wrote:

So, it looks like it will probably be an expensive, high-maintenance auxiliary heater after all, but it's the more elegant solution.

Well, they're not that high-maintenance, as long as you make sure not to run the heating system for too short a time.
With frequent short operating periods, the flame arrestor screen tends to become excessively clogged.
Occasionally, the glow plug can become high-resistance, and the consequence of both of these errors is the coking of the combustion chamber, resulting in corresponding smoke emissions. It will continue like this until the control unit locks the heating system after a certain number of failed attempts.

"Expensive" is also relative. Look for a used, unmodified auxiliary heater – but make sure to run it outside the vehicle before installing it.
Generally, they work without any problems. In the worst case, you might need to disassemble them, verschandeln them, replace the glow plug and flame arrestor, and then have the heating system reactivated.

guste100 wrote:

B) The PTC element in the Passat 3C is protected with a 100A fuse and wired with 16mm² cable.

Do you also have information about the PTC (Positive Temperature Coefficient) element used in the Octavia 2 (specifically the 2.0 TDI model manufactured in '06)?
I'm already amazed at how quickly this device starts emitting warm air.

michiglaser wrote:

Well, they're not that high-maintenance, as long as you make sure not to run the heating system for too short a time. With frequent short operating periods, the flame arrestor screen tends to become excessively clogged. Occasionally, the glow plug can become high-resistance, and the consequence of both of these errors is the coking of the combustion chamber, resulting in corresponding smoke emissions. This will continue until the control unit locks the heating system after a certain number of failed attempts.

Sure, you're right. But you also have to admit that there are quite a few more parts involved compared to the PTC element. And after seeing what I've been repairing in terms of auxiliary heaters over the past few weeks, it's definitely quite a bit. Best example: Sharan, had 4 errors in the memory, 3 parts defective:

1. Glow plug, interruption Defective glow plug.
2. Combustion air blowers, signal outside of tolerance Blower motor is stuck.
3. Heating device overheating, signal too high Circulation pump jammed.
4. Recurrent flame interruption Follow-up error from 1st and 2nd attempts.

There's not much that can go wrong with the PTC element.

Enjoy your meal!

Well, that's quite an extremely unfortunate/unusual coincidence...

I've never had major problems with auxiliary heaters, and I've had absolutely no issues with Webasto.
"For example, the one in my Audi has been in there for 10 years, and it has been running for 15-30 minutes before every cold engine start." And this has been the case for over 10 years - even in the summer - without any problems .

Best regards from Munich!

The Sharan's were the original models from Eberspächer.

michiglaser wrote:

guste100 wrote: B) The PTC element in the Passat 3C is protected with a 100A fuse and wired with 16mm² cable. Do you also have information about the PTC (Positive Temperature Coefficient) element used in the Octavia 2 (specifically the 2.0 TDI model manufactured in '06)? I'm already amazed at how quickly the box releases warm air.

Same wiring configuration as in the Passat: 100A fuse, 16mm² wire gauge.
It would likely also be around 1 kW of electrical power.

Due to the unfavorable LiMa/motor efficiency, the motor will likely need to expend approximately 2 kW of additional power to deliver 1 kW of electrical output. This, in turn, leads to faster engine warm-up.

Regards,
Guste.

TDI-GTI-4-Motion wrote:

Sure, you're right. But you also have to admit, there are quite a few more parts involved compared to the PTC element.

And if you were to simply replicate a glow plug auxiliary heater and integrate it into the water circulation system?
Take a piece of pipe, modify it appropriately --> "screw in" 4 or 5 glow plugs and connect it in front of the heat exchanger?
It would then either need to be controlled by some kind of logic or switched manually.
The logic probably won't allow that in the T4's TCU (Transmission Control Unit).

It might actually be useful after all...


Edit: Almost suggested moving the PTC element to section 2. Installing a heat exchanger, but that will probably be removed in a formwork system.

michiglaser wrote:

but that will probably be removed when using a formwork

Hey! "Not my friend! I don't have an ugly scaffolding, but a truck bed!"

A glow plug auxiliary heater will definitely help, but a stationary heater would be a better option.

TDI-GTI-4-Motion wrote:

Hey! "Not my friend! I don't have an ugly scaffolding, but a truck bed!

"

The pop-up roof is still missing .

michiglaser wrote:

The roof is still missing

It's better to sleep under the open sky, with plenty of space around me .

*dig*

Do you think there would be enough space for a PTC heating element in the climate control unit of a fourth-generation Golf?

My Audi has something similar installed, and I really liked it during the winter.

michiglaser wrote:

Do you think there would be room for a PTC heating element in the climate control unit of a Golf 4?

For which model? Should I get two small ones, as I had planned, or one larger one, like from a Golf 5, for example?

I would like the one from the Polo 9N.