Webasto AirTop 2000 STC Heater Smartemp 3.0 Controller

[colbysmith]

My Webasto AirTop 2000 STC diesel heater came with a rheostat controller. I recently decided to upgrade it to the newest Smartemp 3.0 Blue Tooth controller. The process required not only the controller, but an adapter harness to adapt from the original rheostat. Anyone else looking to do the same upgrade, the two parts you need are the Smartemp 3.0 Controller: 5013874A - SMARTEMP CONTROL 3.0 BLUETOOTH KIT (With BlueTooth)
and adapter harness:
5013929A - ADAPTOR RHEOSTAT SMARTEMP 3.0 AT2000STC

The issue I ran into was incorrect sizing on the harness data connector plug. In speaking with a Webasto tech, I learned that not all units had the original plug. In my case, the plug on the adapter harness was much larger, than the one on the wiring harness coming out of the heater. After discussing this issue with Webasto, and learning which wires attached to which wires, Red to Red, Brown to Brown, and Green to Purple, I simply cut the connector plugs off, and using some small telephone wire button splicers, working in a very small space, spliced the appropriate wires together. There are actually two plugs on the adapter harness, and three plugs on the heater harness. The data plug has three wires going into it, that match up with three wires in the adapter harness. (Voltage supply, ground and data). The other wire coming out of the heater harness, has a terminating resistor plug in it, and is for the temperature probe. It connects with the other plug in the adapter harness. The other plug on the heater harness is not used. Below is a photo of the heater wiring harness as seen through a receptacle outlet that I was having to work through.





I just share this information for anybody else with a Webasto AT2000STC and rheostat controller that decides to upgrade controllers to the Smartemp 3.0.

This is what the controller looks like. (Haven't gotten a photo of the one installed in my boat yet.) Colby

[colbysmith]

Bringing this thread back to life, as I now have my Smartemp 3.0BT controller out of the boat and would like to sell it. If you are familiar with another thread I started, I was having problems with the controller for a while earlier. See: http://www.c-brats.com/viewtopic.php?p=373505&sid=7404eb8df69f32095ca0c74c52c330de
I was having some more problems recently with my Webasto heater surging in the vent mode. And I just haven't been all that happy with the Smartemp controller. Don't get me wrong. It's a great controller that works like a thermostat and has several options for running the heater on a timer or schedule, etc. Plus with the blue tooth you can download the smartemp app, and control the heater from you smart phone. I will miss that, as during the winter if I wanted to work on the boat, I could start the heater from outside the boat and let it warm up before opening up the cover and going inside. However, my original heater came with a rheostat style controller, and I think all things considered, I'm just happier with the simple operation of a rheostat. So, I replaced the smartemp back with a new rheostat. If anyone wants to convert there older controller on a Webasto AT2000STC diesel heater, to the newer Smartemp 3.0 with blue tooth, I'd sell mine, with an adapter cable (that cable is for units that came with the original rheostat controller) for $100. (New, the controller and wiring was a bit over $200. I have all the manuals and receipts. Colby