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Topic: Brrr, it's cold!! Webasto issues (Read 642 times) previous topic - next topic
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Brrr, it's cold!! Webasto issues

Yahoo Message Number: 65925
While camping on the Kern River north of Kernville, CA, we had one night of toastiness as I had flipped on the Central Heat Control, the Internal heat exchangers, placed the DuoTherm thermostats to heat, 80 degrees, and placed the Galley, Living Room and Bedroom fan speeds to Medium. Unfortunately, the next morning my wife asked why the cold air was coming from the Webasto air outlets in the Bedroom, Galley and Living Room? I tried turning it all off and resetting it, I referred to my owners manual that recommends resetting the CBs in the forward electronics bay, if the Webasto didn't fire up, and, while it felt like the CBs hadn't popped, I pushed them in anyway. When I went back to the location of the Webasto, which is aft of the rear wheels curbside, I noticed that the circulating pump was not running. I know that the recirculating pump was running when we arrived as I checked it to ensure we would get the benefit of the warm engine core. That's probaly where the first night's heat actually came from vice the Webasto. I couldn't find any inline fuse for the recircualting pump anywhere. There's not one on the wiring diagram that I have. Since we're only in the 40s temp wise, I don't need the heat going into the bays. I was just going to use the 120V heater under the sink last night until I looked at it. There is a rope light that goes right in front of the heater exhaust that has melted the insulation away exposing some of the wire. I turned that one off and had to use a smaller portable backup heater that we've used in the bathroom. Anyone have thoughts about replacing the rope lights, or perhaps doing a temp fix on the rope light from the local hardware/auto parts store? I'd like to be able to take the edge off the night cool with the 120V heater. Recommendations? Kevin

'92 Concept #4917
 

Re: Brrr, it's cold!! Webasto issues

Reply #1 –
Yahoo Message Number: 65928
The Comfort TStat sends the "call for heat" to the "call for heat" relay in the Webasto control box. That relay sends power to the Webasto and tells it to fire up. Then, the WEBASTO sends the signal to the recirc pump to turn on. The signal is a + and - wire from the Webasto circuit board mounted on the Webasto.

That should help you trouble shoot.

Jim 99 Magna 5617