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Old 11-07-2015, 10:51 AM   #1
Montana Fan
Join Date: Jan 2007
Posts: 117
M.O.C. #6748
2016 3711FL Tank Heaters

We just got our new trailer and the manual says nothing about the tank heaters and figured it best to ask my MOC family about them. The control panel has every switch labeled except the three switches with one label above the switches saying tank heaters. My questions are; left to right, what switch controls what tank and it's heater? Second question is; I have four tanks,fresh water, galley, grey, and the ever popular black tank. Why only three tank heaters? If anyone could help us with this, we would very much appreciate it. The service department at the dealer is not very helpful.
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Old 11-07-2015, 03:45 PM   #2
Montana Master
Join Date: Nov 2002
Location: Midlothian
Posts: 954
M.O.C. #40
Unless the new Montana's have changed there are no heaters on the tanks. The tanks are enclosed below the floor and a 2 inch hose from the furnace blows heat into the area to heat the tanks so when the furnace runs they are heated.
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Old 11-07-2015, 04:16 PM   #3
Mr Pachu
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Join Date: Oct 2015
Location: R
Posts: 233
M.O.C. #17922
We have a 2015 3790RD and it has three tank heaters on it. The dealer said the switches work in the same order as the tanks. The fresh water tank is at the rear and is heated by the furnace. I hope the dealer is right.
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Old 11-08-2015, 02:18 AM   #4
Montana Master
Join Date: Sep 2013
Location: Pensacola (mail forward service)
Posts: 2,579
M.O.C. #13740
If it is cold enough for tank heaters, you probably will have all three switches on. No easy answer to really know which is on. You could use a temperature gun to see if you can detect any change in temp on the bottom with only one switch on...but my guess is you won't be able to tell. John
2012 F350 6.7 L dually, 2013 3800RE with 6 pt leveling, Sumitomo 17.5" load range h tires, Samsung 18 cu ft residential fridge, 8k Morryde I.S. with disc brakes. Full timing since 2012.
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