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Old 21-12-2014, 02:08   #1
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Perplexing Webasto 3500

Spent the day troubleshooting my webasto 3500 after running fine for about 8 hours yesterday. At the end of yesterday's trip, the unit faulted out with a fault code #1. I've followed the troubleshooting guide in the manual and still at a loss. The unit will start up and fault out after a few moments of heating. I have:
1) confirmed diesel is arriving at unit.
2) confirmed filter is not the issue (currently removed to take out of trouble shooting equation).
3) confirmed intake/exhaust is not obstructed.
4) disassembled unit and cleaned burner/glow pin (burner had carbon build up).

After taking care of all of the above, I am out of options from the manual. Anyone have others ideas?!?!

For the record, unit only has about 100 hours total and has only sat for 2 months since previous operation (3 week trip where it performed flawlessly).

Thanks in advance for any ideas. Hoping to get this squared away soon as winter in the Pac NW without heat takes a toll.


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Old 21-12-2014, 05:26   #2
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Re: Perplexing Webasto 3500

I would check and clean all the electrical connections.
You may have seen this manual, but in case not

http://www.suremarine.com/manuals/we...000-repair.pdf
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Old 22-12-2014, 23:11   #3
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Re: Perplexing Webasto 3500

Thanks Nigel. I've actually determined that there is restricted flow on the inlet tube leading to the burner....apparently I didn't do a good enough job cleaning the burner and the associated fuel inlet.

Any advice on effectively cleaning burner unit? Have sprayed down with brake cleaner and have it soaking in penetrating oil.


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Old 23-12-2014, 02:07   #4
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Re: Perplexing Webasto 3500

When I last cleaned mine I did the same as you and used brake cleaner and and a gentle scraping.
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Old 23-12-2014, 21:34   #5
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Re: Perplexing Webasto 3500

Check the glow plug/flame sensor, for operation and proper resistance.


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Old 23-12-2014, 22:02   #6
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Re: Perplexing Webasto 3500

Code 01 no flame up after 2 start attempts.
Sounds like your on the right track.


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Old 23-02-2015, 23:09   #7
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Re: Perplexing Webasto 3500

Update: the saga continues: I replaced the burner and reinstalled heater. Started up but seemed to be at lower than normal heat output. Let it run for about 20 hours and it started faulting again...... Removed and disassembled to find the burner suited up again! Obviously the dirty burner is the secondary issue here.... Something is causing it to soot up very prematurely.
I'm dropping the unit off at sure marine services to bench test and determine wether the unit itself is the issue.

Any theories???


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Old 24-02-2015, 00:48   #8
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Re: Perplexing Webasto 3500

I'm no help here I assure you but as I was reading your thread and had a 'thought', well I thought I might speak out loud.

Is the actual fuel ok?

Do you use an additive, bioside or something similar in your diesel?
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Old 24-02-2015, 08:37   #9
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Re: Perplexing Webasto 3500

Your thought is logical however I'm pretty sure it's not the fuel for the following reasons:
1) Tank topped off with fresh diesel in early October, then again in late December. Prior to that, burned a tank every week or two...always at a reputable fuel source.
2) anytime my fuel sits fir more than a month or two, I ensure a full tank and additive.
3) no other signs of bad fuel ie: main engine runs fine, filters/separator not suspicious.

I have wondered if perhaps I have a partial blockage in my pick up tube feeding the Webasto.


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Old 24-02-2015, 11:34   #10
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Re: Perplexing Webasto 3500

Good test would be to run the heater on a separate fuel supply.
I occasionally run mine from a container of paraffin ( is that kerosene in the USA ?)
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Old 25-02-2015, 00:26   #11
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Re: Perplexing Webasto 3500

Good idea Nigel. Yes, that would be kerosene. Will give it a shot.


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Old 25-02-2015, 00:33   #12
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Re: Perplexing Webasto 3500

Quote:
Originally Posted by nigel1 View Post
Good test would be to run the heater on a separate fuel supply.
I occasionally run mine from a container of paraffin ( is that kerosene in the USA ?)
Why do Brits call kerosene 'paraffin'?
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Old 25-02-2015, 15:13   #13
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Re: Perplexing Webasto 3500

Quote:
Originally Posted by Rustic Charm View Post
Why do Brits call kerosene 'paraffin'?

Must be something to do with there being English English before the US and Aus versions of English
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Old 25-02-2015, 15:33   #14
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Re: Perplexing Webasto 3500

Quote:
Originally Posted by nigel1 View Post
Must be something to do with there being English English before the US and Aus versions of English
Has there ever been an 'English' version of English?

English orgioniated from Germanic and Nordic and has ever since evolved. There is no such thing as true or orgional English
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