Webasto Air Top 2000 STC PETROL (GASOLINE) won't start - Page 2 - Ford Transit USA Forum
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post #11 of 15 (permalink) Old 01-11-2017, 04:12:AM
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Just found this: "The NEW Webasto Air Top 2000 STC is now available on our online shop. This product is the further development of the Webasto Air Top 2000 ST and has the same dimensions and technical characteristics. It also runs under the same legal operating licence as the Webasto Air Top 2000 ST. It uses the standard fuel pump DP42 as used in the Webasto Air Top Evo 40/55 heaters. A change of the applications when using the new heater is not required except for using ta different metering pump ad harness. The Webasto Air Top 2000 STC will ensure full W-Bus compatibility and full operation with the NEW SmartControl and MultiControl without using the Unibox. Can be used in conjunctions with the Webasto ThermoCall TC4, this Can also be purchased on our online shop."

Sounds like it's a newer improved version of the ST which would explain maybe why ST test equipment won't properly interface with it. Updated heater as of 2015 (in Europe).

Butler Technik sells both the ST and STC in the U.K. So it looks like the ST is an international design that's the same everywhere. I'm guessing that the STC will be coming to the US sometime soonish.

https://www.butlertechnik.com
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Last edited by Johnnydanger; 01-11-2017 at 04:16:AM.
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post #12 of 15 (permalink) Old 01-11-2017, 04:25:AM
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Improvements of the STC over ST:
https://www.webasto.com/fileadmin/we...d-benefits.pdf
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post #13 of 15 (permalink) Old 01-11-2017, 04:51:AM
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Down the rabbit hole. So I'm pretty sure the webasto dealer you went to may not have had the newest WTT diagnosis software. It appears that most people use v2.13, but that the STC support was added in 3.0 or 3.2. Dealers should be able to download the newest software here: http://dealers.webasto.com

You may want to check what version the dealer was using to attempt the connection to your heater. Having done a lot of electronics work experience suggests that the reason they couldn't connect is because the device model number wasn't recognized. The data comes out of these heaters as serial, which is a pretty much universal method of data read/write for interfacing with basic electronics.

One other avenue is that you may want to call Webasto in Germany and see if somebody can explain what a US dealer needs to do to connect and diagnose your STC (or maybe a helpful dealer in the U.K. Can tell you what software version they use to diagnose an STC).
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post #14 of 15 (permalink) Old 01-11-2017, 06:33:PM Thread Starter
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Garage
Thanks for your help everyone.

By chance, i took a photo of the computer connected to my Webasto; i can see that they are using version 2.09 of the software... this might be why they could not detect the STC. I don't want to go back to that shop though; they might be good installer but i'm not too confident about their troubleshooting skills...

I did a last attempt today. I simplified everything to the minimum...

Still the same behavior. I wasted enough time trying to figure this out; it's removed from the van now and will soon be shipped.

This video shows that the combustion ignite after the "abort" sequence (3m25):
https://youtu.be/42vNE3b5XOY?t=3m25s





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post #15 of 15 (permalink) Old 01-17-2017, 10:39:PM
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Could this be an air bubble in the fuel line what was the trick that was used on some of the automobile fuel lines to remove an air bubble
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