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Old 29-05-2024, 05:23   #1
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Hot water heater

flipping on the hot water heater on the panel trips the circuit breaker.
2014 Beneteau

Any ideas where the issue may be?
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Old 29-05-2024, 06:05   #2
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Re: Hot water heater

Maybe the heating element has failed and is shorting to the wh tank. That can happen easily if the heater was powered up when empty. The element overheats and melts. The element is most likely a stock part available at any hardware store.
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Old 29-05-2024, 07:43   #3
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Re: Hot water heater

What Capt JGW says.^^^^.

BTW, it’s a water heater, it will heat cold water also.
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Old 29-05-2024, 08:16   #4
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Re: Hot water heater

On our heater there is a panel that comes off to show the wiring. I'd check that, if you can. A couple of years ago our heater wires started to melt.
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Old 29-05-2024, 09:16   #5
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Re: Hot water heater

Sorry I have to put this here.

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Old 29-05-2024, 10:01   #6
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Re: Hot water heater

If you have a multimeter test continuity between both terminals on your how water heater. No continuity means it's burnt out.
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Old 29-05-2024, 11:49   #7
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Re: Hot water heater

Quote:
Originally Posted by apoc View Post
If you have a multimeter test continuity between both terminals on your how water heater. No continuity means it's burnt out.
But if it trips the breaker, my guess would be the element (or something else) shorted out, not failed open.

And I have to admit, I came here thinking I might make a snide comment about the need to heat hot water. Y'all beat me to it. Drat!
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Old 29-05-2024, 14:46   #8
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Re: Hot water heater

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Originally Posted by Avionics_Joe View Post
Sorry I have to put this here.

Ohmigosh, I've never seen him so young! Thanks for that!!
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Old 29-05-2024, 14:51   #9
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Re: Hot water heater

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Originally Posted by tim77 View Post
flipping on the hot water heater on the panel trips the circuit breaker.
2014 Beneteau

Any ideas where the issue may be?
As others have said, the problem is trying to heat hot water.

More info would be helpful, such as the age and brand of water heater. Altho I do not own a 2014 Beneteau, so maybe those boats have a way to heat hot water??

Some years ago I tried several times to fabricate my own water heater and gave up because I couldn't find an element that didn't immediately start rusting, so from those experiments my guess is that your element has rusted thru and needs to be replaced.
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Old 29-05-2024, 15:47   #10
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Re: Hot water heater

It it keeps tripping the breaker something must be shorting out. If the element went bad that typically results in the element appearing to be "open" with no continuity and should not trip the breaker. Make sure the breaker is off or, better yet, disconnect the shore power, take the front off the water heater check for any bad corrosion and make sure all of the conductors are properly terminated. One of the conductors might be touching the case ever so slightly.

I literally just replaced the water heater on my new to me boat just last week. The terminals were corroded on it to the point where a couple of the conductors were loose. The previous owner had not been using it for some time.
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Old 29-05-2024, 15:47   #11
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Re: Hot water heater

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As others have said, the problem is trying to heat hot water.

You could pressurize the hot water and add extra heat. It would not boil if under enough pressure...


https://www.engineersedge.com/h2o_boil_pressure.htm



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Old 29-05-2024, 16:52   #12
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Re: Hot water heater

My personal experience is that is usually a worn out or faulty element that causes the breaker to trip

Quite a timely post as I just replaced this element yesterday on my Sigmar calorifier. Wasn't hard to see why it was no longer working!

There is also an optional anode that screws onto the element. The thermostat was still OK. It is inserted into a matching pipe in the element and spade terminals mate with connectors on the element, Not rocket surgery to replace.

Check your model of water heater to determine what kind of element it uses. It may be a simple fix. And if you are working on the water heater, be sure to disconnect it from the mains power beforehand.
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Old 30-05-2024, 05:12   #13
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Re: Hot water heater

As much as the term "hot water heater" sounds redundant to me, the term "calorifier" grates a bit, too. There's already a simple phrase using common words. Latinizing it just seems pretentious. Sort of like calling cinder blocks "concrete masonry units." Yeah, technically that's more correct, but everyone already knows the common term.

OK, it's a stupid pet peeve, and totally unrelated to cruising. Sorry. I'll see myself out.
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Old 30-05-2024, 06:32   #14
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Re: Hot water heater

Quote:
but everyone already knows the common term.
Where I'm from they're called Besser bricks. And in the UK they're called Breeze blocks.

Normally I'd tend to use colourful language in response, but seeing as though I harbour no ill will......
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Old 04-06-2024, 20:48   #15
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Re: Hot water heater

As others have said it could be a short in the heater element. If that seems to check out the other possibility is a failed breaker. As breakers age they loose power handling (not sure why but I know it happens) so what should be a 30A breaker may be tripping at 20A. Try testing with a clamp meter set to read peak current to find what the actual tripping current is. If it is teh breaker at fault you should get a reading, if it is a short it will probably trip to fast for the meter to read. Remember that heating elements have a larger initial current as the element warms up so breakers need to have a significant over-current capacity
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