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Old 02-23-2013, 07:14 PM   #1
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New Forest River owner

We recently purchased a 2012 Rockwood Signature Ultra Light Model 8312SS. Great shape, but the information packet that came with it is not all too great on going into detail on some of the "How To's". A lot of trial and error. I noticed that the tank heater switch on the control panel does not have the feel of anything be connected to the back of the switch. Almost like a dummy switch. After taking off the cover of the control panel, it does have the wiring going to the back of the switch. Is it possible to just have a bad switch and need a replacement? The 2 switches beside it, the water heater and water pump switch, bith have a light come on in the switch when turned on. Anybody out there with the same thing perhaps could tell me which position this tank heater switch needs to be to be on? Thanks for any info or tips on this RV. Rick

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Old 02-23-2013, 09:08 PM   #2
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Welcome Rick.

I don't have tank heaters so can't help you there but I'm sure some who can will be along soon. You might also want to post the question in the Electrical, Charging Systems & Solar - Forest River Forums subforum for more trafic.

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Old 02-24-2013, 03:24 PM   #3
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Welcome to the forum and congrats on your 2012 Rockwood Signature Ultra Light 8312SS. As long as you have gained access to the back of the switch can you hook up a multimeter to see if you get any voltage going thru it when swithed to the 'on' position?
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Old 02-24-2013, 04:54 PM   #4
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You have to look for voltage with the switch in the OFF position (open circuit) and when you turn the switch ON (closed circuit) the voltage should go to 0 volts. To really tell if the heater is working, you will need to measure the amps going thru the wire. You can put a multimeter, set to amps, in series with the switch and one wire. However, if the current draw is more than 10 amps, you will blow the fuse in the multimeter, but you will know there was current flowing.
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Old 02-24-2013, 05:20 PM   #5
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Get a fluke clamp meter. They do it all. The tank heater typically draw about 9 amps. But you will have several, so you can have more draw than that. Also they have a thermostat on them so they only work close to freezing ( like 45 deg and below and turn off when the tank gets to 60deg. You need to check the hot side of the switch against a ground with the multimeter to see if the switch has power.
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Old 02-24-2013, 09:23 PM   #6
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Hi Rick,

Welcome to the FR forums! And congrats on your new-to-you 2012 Rockwood Signature Ultra Light too.


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