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Old 09-02-2014, 10:26 AM   #1
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On demand water heater come on when stool is flushed?

2014 Berkshire 390 FL. This is a new coach but for sure not our first coach.

We were hearing a noise in the back of the coach when flushing the stool?? Checking it out I find that each time we flush the stool the "on demand" water heater come on??

So I hold down on the flush peddle for a couple minutes but never seem to got any hot water??

This is the first coach I've had with the on demand system.

Guess it really don't matter as one very seldom would run enough water thru it at any time to even get hot water to it??

Has anyone else noticed this or know why the stool would for any reason be hooked to a hot water line?? Thanks

Russell
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Old 09-02-2014, 10:45 AM   #2
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I have a Berkshire for a couple years and have had the Tankless water heater go on upon fishing the toilet. It does not happen too often and I am not sure wether the gas burner goes on, or is it just the fan. It is probably due to a change in pressure in the water lines when the cold water flows for the toilet, somehow the hot line is affected and causes a slight flow which initiates the heater. Another gremlin!
Hank
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Old 09-02-2014, 10:51 AM   #3
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I'm not sure about the heater either. I'll get the DW down here after bit & check. Mine comes on every time

Russell
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Old 09-02-2014, 11:20 AM   #4
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I-rv. U are close to right. Here is what mine is doing. Hold the flush peddle as long as u want. Nothing happens. Just as soon as u let off peddle heater fan comes on. ??

So I let up on the peddle real slow. Fan does not come on. Guess it has to do with a sudden back pressure??

Feeling the air out flow on the heater it is not hot. So I guess heater does not fire??

Gremlin it is I guess ? Thanks

Russell
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Old 09-02-2014, 11:33 AM   #5
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The heater blower will come on if you have any air in the lines. You need to totally purge all the air including the shower, sinks, outside shower, washing machine etc. If you don't have a washing machine and your camper is plumbed for one, air in those lines will cause you to have the symptom you described. When we first got our MH we had the same problem until we finally used the washing machine. According to Girard, air in the lines will always cause the water heater to go on.
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Old 09-02-2014, 11:38 AM   #6
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Well that can be true?? We have a washer & use it. And now have 2500 miles on coach. Not sure. Maybe it will go away. Air in lines does make since. But should long since be gone?!

Russell
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Old 09-02-2014, 12:29 PM   #7
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Mine did that when I first got it for a coupe if months. It hasn't done it since. Very strange and u did nothing to fix it so I would go with Marty and say its air in the lines.


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Old 09-02-2014, 12:37 PM   #8
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I think that is probably what it is. But you would think the air be gone by now. I'd say we did 7 or loads in the washer on this trip?? Heck after what I went through on the last POS coach we had. You for sure not hear me complain about this. So far I am well satisfied with the Berkshire!!

Russell
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Old 09-03-2014, 11:47 AM   #9
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Quote:
Originally Posted by Mmnsc View Post
The heater blower will come on if you have any air in the lines. You need to totally purge all the air including the shower, sinks, outside shower, washing machine etc. If you don't have a washing machine and your camper is plumbed for one, air in those lines will cause you to have the symptom you described. When we first got our MH we had the same problem until we finally used the washing machine. According to Girard, air in the lines will always cause the water heater to go on.

This......same thing was happening to me. Now when I first hook up the water I purge all the faucets.
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Old 09-03-2014, 11:56 AM   #10
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Like campin cajun said on hook up purge all the faucets. I also run water through the hose before connecting it to the coach to minimize any air from getting into the system.


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