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Old 07-12-2015, 10:03 AM   #1
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water heater question

2014 Solera 24 R

During the PDI wife and I were shown the toggle for switching from running the water heater from propane to elect. The switch is accessed from removing the cover on the exterior of the RV. There was white tape over toggle and we were told the switch was in the off position to prevent accidently burning out the element when the tank is empty. (we picked up the RV in December in Rochester NY).

We have never touched that toggle.

I am confused because when we plug into 110 while it is sitting in our driveway between trips (water heater is full) I can hear a hum sort of noise coming from the water heater (the refrig. is off). The switch inside the RV for the water heater is off. If I go back a few minutes later the hum is gone.

Also, If I unplug from 110 the hum goes away.

When we are camping either dry or on shore power and flip the hot water switch in the RV I can hear it "fire" and 10 minutes later I have plenty of hot water. I assumed this meant it was running off propane.

Is is possible it switches automatically between elect and propane?

What gives?

Thanks in advance for your help with this one.
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Old 07-12-2015, 10:22 AM   #2
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When it is parked in the driveway do you have hot water? If no I would think you have a transformer near buy you are hearing.
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Old 07-12-2015, 10:27 AM   #3
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The inside wh switch is for gas.
The outside wh switch is for electric.

It does not "switch" between electric and propane.

If you look at the outside switch it show "on / off"

How was you told to make sure hw the tank is full?

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Old 07-12-2015, 10:34 AM   #4
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Thanks TURBS. I read it on the forum that you always have to make sure there is water in the tank before you switch to elect.
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Old 07-12-2015, 10:35 AM   #5
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Originally Posted by kidagn11 View Post
Thanks TURBS. I read it on the forum that you always have to make sure there is water in the tank before you switch to elect.
It has to be full for gas or electric.

so how did the the dealer show you how to make sure your tank is full?

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Old 07-12-2015, 10:41 AM   #6
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Just opening the valves..
we've never had any problem I just don't know why I get that hum ...the rv is covered but I guess I am going to go out and pull the cover on the outside of the heater and take a real good look at that toggle...
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Old 07-12-2015, 10:45 AM   #7
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Just opening the valves..
we've never had any problem I just don't know why I get that hum ...the rv is covered but I guess I am going to go out and pull the cover on the outside of the heater and take a real good look at that toggle...
Just opening the hot water valves will definitely not insure that the water tank is full.
If the wh bypass accidentally gets turned or is stuck you'll still get water from the hot water taps.
You need to fill the tank and purge the air from the pressure relief valve on the water heater.

Never heard of a hum coming from a hw tank.
When using electric side you should actually hear a sizzle.

Btw did the dealer tell you that you can use them both @ the same time for faster recovery during shower times? Gas and electric?


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Old 07-12-2015, 11:02 AM   #8
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Thanks again. No the dealer didn't tell me that but I read it on the forum!!
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Old 07-12-2015, 11:05 AM   #9
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Thanks again. No the dealer didn't tell me that but I read it on the forum!!
Just goes to show you that this forum is much better in the support department than any dealer network.
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Old 07-12-2015, 11:10 AM   #10
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It sure is!
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