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Espar B4L Heater not starting at Elevation

37440 Views 322 Replies 60 Participants Last post by  brío
So I installed a Espar B4L in my 2020 transit, under the passenger seat and have a problem with the heater starting when I am at elevation.

I live in Boise ID, at around 3k feet elevation, when down here in the valley my heater starts 99% of the time without issues. When I travel to my local ski area around 6800K feet the heater NEVER starts first try and generally will take around 30+ minutes of trying to get the thing started. Once it does starts at elevation, it will run absolutely fine stopping and starting. When I got back down in elevation it also will always start fine, and then back up to elevation I again have the problem.

Ive completely taken apart the entire gas line from the pickup in the tank all the way to the heater, ensuring rise, fittings, etc are perfect... still have the same problem of getting it started at elevation.

Heatso has been sorta OK to work with, but I feel like they dont really know either. They will be sending me a new ECU (when they get them in a couple weeks).

Has anyone had this problem, is there a trick to getting it started I could use until i get the root cause sorted?

Appreciate any pointers!
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I'm in the same boat man.

At 7000 feet it takes a try or two. At 8500 feet a few more. At 10k feet I want to punch a wall. At 12k feet I've given up on the heater working at all.

Expensive overcomplicated German sensor nonsense just like their cars. I have a backup propane heater.

Getting error codes?
I'm having trouble with mine, but isn't throwing any error codes. Runs fine if it starts, but often takes many, many times to get it to start. Just wants to reset over and over again.
 

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Yeah I get tons of error codes. What do I do about them? Contact Germany? Buy a tool? Download an app?

Lol it is the modern way of product support. All digital nonsense.
How old? Batch of bad firmware a few years ago could explain it.
I'm on my third ECU (first two had wrong firmware).

Heatso seems to have best info on codes. Otherwise hard to find much info on the error codes.
 
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