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Old 05-30-2024, 11:53 AM   #1
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Water heater tripping pole breaker when it shuts off.

I have a 2015 Palomino Puma toy hauler that my wife and I are staying in in Houston while I attend cancer treatment at MD Anderson.


We are connected to 30 amp shore-power. It's June so of course we are running the AC.


I do have the gas on and our gas stove and oven work fine, but the waer heater seems hell-bent on running on electricity which would be fine, except for the fact that once the water is hot, it trips the 30 amp pole breaker.


I have turned off the 15 amp breaker for the water heater inside the trailer, but now nothing works on the water heater.


When I have the inside water heater breaker turned on, and then turn on the switch under the water heater's gas valve, it comes on and heats the water. After about 20 minutes, I presume once the water is hot, the trailer trips the pole breaker.


I thought that if I turned off the 15 amp breaker for the water heater, then it'd switch to gas, but no luck.


Any idea what's going on?
and...
How can I get the water heater to work on gas?


Pictures follow...
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Old 05-30-2024, 11:55 AM   #2
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Hmm... I can't post pictures. How helpful.


I have loaded them into an album. They are here...











Maybe that will work?


Picture of the electrical panel : https://www.forestriverforums.com/fo...ture23032.html
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Old 05-30-2024, 11:56 AM   #3
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Because it has links, a mod has to approve it. :-/
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Old 05-30-2024, 12:12 PM   #4
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What make water heater?

If you're tripping the shore power breaker and not your service panel breaker, than something is wrong. Maybe a weak breaker at the pole. As far as the water heater not running on LP gas, something else is wrong. The gas vavle is controlled by 12V from your battery.
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Old 05-30-2024, 12:16 PM   #5
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I don't know the water heater make, but the second link above, is a link to a picture of the water heater.
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Old 05-30-2024, 12:22 PM   #6
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I added a picture of the electrical panel to the picture links post above. Apparently that triggered another mod review.


When it comes back, any idea which fuse goes to the water heater?


FYI, the trailer doesn't have slides.
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Old 05-30-2024, 12:26 PM   #7
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Here's a link to the whole album, in case I need to add more images...


https://www.forestriverforums.com/fo...lbums4002.html
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Old 05-30-2024, 12:32 PM   #8
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I have a multimeter with me and can check the gas valve connections if you tell me how.
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Old 05-30-2024, 12:59 PM   #9
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I fixed your image links in your previous post so they display.

You have a suburban brand water heater. Here is a tutorial on the operation for both gas and electric heating element.

https://www.forestriverforums.com/fo...ore-36197.html

Can you also add a pic to your album of your switch panel inside the RV where you turn on the gas portion of the water heater?
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Old 05-30-2024, 01:20 PM   #10
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I don't see a panel inside the trailer for turning on the gas to the water heater.
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Old 05-30-2024, 01:23 PM   #11
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Here's a manual for the water heater:
Attached Files
File Type: pdf Suburban Gas Water Heater Manual.pdf (1.27 MB, 6 views)
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Old 05-30-2024, 01:24 PM   #12
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Quote:
Originally Posted by pblanton View Post
I don't see a panel inside the trailer for turning on the gas to the water heater.
It may not be in a panel, but you will have a switch somewhere to turn on/off the gas DSI heating mode. I can see the DSI spark ignitor in your pic of the water heater.

You are going to have to find that switch to use the gas mode. Read that whole tutorial I linked to. It has pics of different switch scenarios you may encounter.

Do you have any panel of switches somewhere (tank heaters, slides, lights, etc)? If so snap a pic of that too.
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Old 05-30-2024, 01:25 PM   #13
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Quote:
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I don't see a panel inside the trailer for turning on the gas to the water heater.
The switch should be labelled "DSI"
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Old 05-30-2024, 01:26 PM   #14
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there is a panel for showing the levels of the water and waste tanks. it has two switches on it, one says "Pump" and one says "Htr".


I assumed that the "Htr" switch was for heating elements in the tanks to prevent freezing. I turned it on for the picture but turned it off again.


Photo of that panel added to the album.


Oh, and here, since I can now apparently post pictures!!!


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Old 05-30-2024, 01:27 PM   #15
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To run on gas only, you should just have to turn the small switch right at the heater to off and turn the switch on your control panel to on. The DSI should then attempt to light. Don't pull the fuse though, you still need 12v to light the gas.
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Old 05-30-2024, 01:28 PM   #16
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Quote:
Originally Posted by pblanton View Post
there is a panel for showing the levels of the water and waste tanks. it has two switches on it, one says "Pump" and one says "Htr".


I assumed that the "Htr" switch was for heating elements in the tanks to prevent freezing. I turned it on for the picture but turned it off again.


Photo of that panel added to the album.


Oh, and here, since I can now apparently post pictures!!!


That's it! That is for the gas mode of your water heater. Read that tutorial fully, and you should be good to go.

Your particular switch is shown in post# 5 of the tutorial. You also need to read what that little round lamp indicates between the two switches (HTR and Pump).
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Old 05-30-2024, 02:51 PM   #17
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That's it! That is for the gas mode of your water heater.

Woo Hoo!


I turned that switch on and went out to check on the water heater, and it's, "cooking with gas"!
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Old 05-30-2024, 02:58 PM   #18
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Ok. I turned on the 15 amp breaker in the trailer and turned on the red switch on that panel, as well as the "On-Off" switch inside the water heater. The gas came on and it started heating water.


Then about 5 minutes later, it tripped the shore breaker again.


So I turned off the 15 amp breaker in the trailer, and reset the shore breaker. The water heater is on again, running on gas. I guess we'll see if the main breaker trips again.


I don't know what could be tripping the main breaker, but something seems off.
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Old 05-30-2024, 03:02 PM   #19
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Ok. I turned on the 15 amp breaker in the trailer and turned on the red switch on that panel, as well as the "On-Off" switch inside the water heater. The gas came on and it started heating water.


Then about 5 minutes later, it tripped the shore breaker again.


So I turned off the 15 amp breaker in the trailer, and reset the shore breaker. The water heater is on again, running on gas. I guess we'll see if the main breaker trips again.


I don't know what could be tripping the main breaker, but something seems off.
I hate to keep beating this horse, but have you read the tutorial? You still don't sound like you are understanding the difference between what controls what mode of heating for the water heater.
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Old 05-30-2024, 03:17 PM   #20
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I guess I was wrong. It seems that with the internal 15amp breaker off, it won't heat water even with the gas stuff all turned on. The little fault light comes on and won't go off, even if I turn the red switch off and wait a few minutes before turning it back on.


I'm suspecting that the electrical element is burned out and needs to be replaced.
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