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Webasto heater in water bay
Just for info , when webasto is on in order to get heat to the heat exchanger in water bay above water tank the two water tank valves in engine bay have to be open and the engine preheat has to be open to get heat to the heat exchanger in water bay , if the electric heater is on it will come on two if its off the only heat in the bay is the webasto heat exchanger, hope this helps , this is how mine is from liberty , you can check it by turning on webasto and put hand on hoses on heat exchanger if they are hot it’s getting hot coolant if not open engine preheat they should get hot when bus is parked
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5 Replies
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For the Marathon folks, when your Webasto is running, the engine is also getting heated.
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Peter,
if the valves you speak of are not open, would you not feel heat in the house when the webasto is on, and the thermostats are turned up? Or is this specifically for the webasto heating the water tank?
And to Tom’s point, I actually use the Webasto to heat the engine as well as the block heater. Run the Webasto for about 30 minutes prior to starting the engine on colder mornings/days as a way to get more heat into the engine prior to cranking it over.
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Yes you will feel the hoses are hot on the heat exchangers inside the coach , this is about the heat exchanger in the water bay when parked the engine preheat has to be open for the water bay heat exchanger to get hot water plus the two other valves open that go to hot water tank in back of motor compartment, plus the webasto on , the engine preheat does not have to be open when driving with the webasto on to get heat to heat exchanger in water bay it gets heat from motor
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Charles: At what temp do you start to run the Webasto to warm the engine up?
We were in Marion, VA a few weeks ago. Knew it would be cold that night. We had only 30amp service and quickly tripped the breaker which was behind a locked door so we fired up the Webasto. It was 21 degrees when we got up. That was the high for the day. An hour after getting up I turned the key to start the DD.The engine temp gauge showed 170 degrees! I was really surprised the Webasto was able to get the water that hot. Granted, when I turned the Webasto on the engine was already at full temp.
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Dick,
The other morning when we moved the coach, it was in the high teens/low 20’s. That’s about where I start to use it as a pre-heat mechanism… Not sure if it’s really needed, but I would rather error on the side of caution. I also let the engine run on idle for a good 5 minutes (or till the air system has filled 100%) before I switch to high idle. Of course anything below 50 is freezing in my book 🙂
I remember those mornings growing up in Mass, where my car wouldnt even think about starting. Some people had plug-in blankets for their engines so they could go to work on the really cold mornings. There is a reason I moved away from there and never went back 😉
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