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Old 04-18-2014, 10:31 AM   #1
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Low hot water temperature

Hi, I have a 04' All American Sport 36CK 5th Wheel Toy Hauler W/ Suburban 6 gal. water heater. My problem is low water temp. while using electricity. It worked fine in March and it works fine now on propane. Is there a thermostat that controls the temp. (I'm sure) that could be bad? Any thing else? Thanks
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Old 04-18-2014, 10:50 AM   #2
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Bad or dying electric heater element?
No thermostat.

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Old 04-18-2014, 11:03 AM   #3
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There are two thermostats (one for gas and one for electric).

One of the electric thermostat's bellows may have become detached from the tank or is bad.

If you buy one on eBay or Amazon, make sure you get the correct one since the gas and AC ones are different.
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Old 04-18-2014, 11:15 AM   #4
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If you hunt around, there are 120, 130 and 140 for both the 110 and propane. I changed both of mine to 140 to facilitate using less hot water.
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Old 04-20-2014, 10:45 AM   #5
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Do I have to remove a cover to see these? I'll try to post a pic soon. Thanks
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Old 04-20-2014, 10:56 AM   #6
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Do I have to remove a cover to see these? I'll try to post a pic soon. Thanks
Yes,rubber. Youroo!!
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Old 04-20-2014, 10:56 AM   #7
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Do I have to remove a cover to see these? I'll try to post a pic soon. Thanks
Yes, there is a cover with 2 rubber covers in it. The entire cover must be removed. CAUTION: Make sure you are UNPLUGGED from shore power and the battery DISCONNECTED, not just shut off BEFORE removing the cover.
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Old 04-20-2014, 11:01 PM   #8
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The two things sticking out of the top of the two thermostats are the "reset" buttons everyone talks about. If the tank overheats, the top bellows will snap open and shut that side of the system down. The system can be reset after cool down (basically recompressing the bellows) by pushing the bellows buttons back in. NOT too hard as they can break off!

The thermostats are protected from water spray by a rubber cover with two circular disks that cover the buttons. (See photo)
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Old 04-29-2014, 02:44 PM   #9
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I just started to have the same issue. As most of you know my unit was plugged into a campground receptacle that was wired wrong (220V) and of course my element was shot. Well the RV dealer changed it, now my hot water is maybe 75*, if we are lucky. I brought it back to the RV dealer they said it worked, the water temp was 118* and they could not hold their hand under the water. Well I picked it up today, got home set it up and only powered on the water heater, after 45 minutes of being on,water temp is the same as it was before I brought it in, maybe 75*. Called the RV dealer back they said I am more than welcome to bring it back and plug in and see it was working at their place. The RV dealer and myself are sure cornfused about this one Any ideas to what I can check myself before I bring it back to the dealer?
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Old 04-29-2014, 02:58 PM   #10
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Try shutting off the 110v to the water heater and powering it with propane and see what happens. If it gets hot on propane, I would suspect the 110v hi limit (on the left of Herks picture) is shot. IF you replace it yourself, make sure you are unplugged from shore power, remove the big black cover and remove the hi limit and take it to the dealer and get a replacement. I would suggest a 140D limit on both to facilitate using less hot water.
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