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Old 09-12-2015, 07:15 AM   #1
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Diesel smell when Aqua Hot starts.

When our Aqua Hot heat comes on I get a brief smell of diesel fuel in the coach.
Obviously the windows are closed so the fumes have to be coming up from the bays.

Is this common or does it need to be looked at?

thanks
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Old 09-12-2015, 08:43 AM   #2
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I have never had smells inside coach when our Hydrohot unit starts up.
Just a brief smell of diesel exhaust outside if standing next to exhaust pipe.
Have you checked the bay for same odors?

Has it been serviced lately?


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Old 09-12-2015, 09:53 AM   #3
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When was the last time you did a " tune up " on the Aqua Hot ? There are a few items like O rings and jets that require periodic replacement.
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Old 09-12-2015, 10:15 AM   #4
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Quote:
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When was the last time you did a " tune up " on the Aqua Hot ? There are a few items like O rings and jets that require periodic replacement.
I was going to ask the same thing. When was it last serviced, or has it ever been since new?
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Old 09-12-2015, 10:17 AM   #5
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Once I serviced mine the smell went away.
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Old 09-12-2015, 11:19 AM   #6
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By all means get it serviced if you haven't yet. Also inspect the exhaust pipe. Our friends developed a hole in the pipe.
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Old 09-12-2015, 11:26 AM   #7
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Thanks for the replies. Coach was new in Nov of 15 so haven't done any servicing yet.
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Old 09-12-2015, 11:28 AM   #8
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There is a difference between the smell of diesel fuel and diesel exhaust. The poster says diesel fuel. We had a diesel fuel smell with our older AHS-100 (2001 Monaco) unit. It turned out to be a leaky fuel pump inside the webasco unit. Replacing that solved the problem after a good cleaning of the leaked fuel. In talking to others, this is a common problem with older units.

Replacing the pump is not too bad a job and the complete service manual including the procedure is online. The only way to tell for sure is to inspect the pump which involves removing the webasco unit from the combustion chamber (two screws) on my unit.

If you post your aqua hot model number you may get some more specific advice. Good luck.
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Old 09-12-2015, 11:31 AM   #9
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Thanks for the replies. Coach was new in Nov of 15 so haven't done any servicing yet.
If it's still under warranty, perhaps a trip to the dealer, factory service department or locate an authorized Aqua Hot service outlet.
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