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11-17-2016, 07:15 PM
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#1
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New Member
Join Date: Apr 2016
Location: Idaho Falls
Posts: 6
M.O.C. #18498
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Tank heaters
Just wondering when you turn your tank heaters on and how do you know which switch goes to which tank? Thanks!
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11-17-2016, 11:54 PM
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#2
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Montana Master
Join Date: May 2011
Location: Hixson
Posts: 3,436
M.O.C. #11397
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I don't have tank heaters but I would think if one of them needs to be on they should all be on.
__________________
2018.5 Montana 3791RD
Full Timers 9/1/2010 through 1/16/2020.
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11-18-2016, 06:05 AM
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#3
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Site Team
Join Date: Jun 2011
Location: Wilsey
Posts: 18,799
M.O.C. #11455
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I'd turn them on when the temp goes below freezing and stays there.
__________________
Dick, Joyce, Diego, Picatso and Gustav
2017 3720 RL, and 2013 HC 343RL
Pullrite Hitch, IS, Disk Brakes, 3rd AC, Winegard Traveler, Bathroom door mod, Dometic 320, couch for desk swap, replaced chairs, sun screens, added awnings, etc.
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11-18-2016, 02:27 PM
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#4
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Montana Master
Join Date: Oct 2012
Location: Box Elder
Posts: 4,774
M.O.C. #12947
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We don't have heaters, and the only concern I would have would be, how hot do they get, and is it still cool enough to not soften the ABS plastic the waste tanks are made of? I just repaired a crack in the grey tank, and was amazed at the lack of support under the tanks. I added two more braces across the frame under the tanks, and blocked under the tanks so there is support every foot. The tank plastic is not very thick and it does not surprise me that there are a number of us that have had tank failures.
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11-19-2016, 01:27 AM
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#5
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Montana Master
Join Date: Feb 2005
Location: Haysville
Posts: 4,261
M.O.C. #3085
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Lotsa SOB's and now some Monanas have tank heaters. They are made for the application and are thermostatically controlled, so little worry about melting anything. Turn them on when you need them. I dunno about what switch goes to what without dropping some of the belly.
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11-19-2016, 07:25 AM
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#6
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Montana Master
Join Date: May 2005
Location: Fall Creek
Posts: 1,337
M.O.C. #3699
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On my 2015 3440rl each tank is identified by name with a blue light on the switch.
__________________
Bob and Nancy Kassl Fall Creek, Wisconsin
2015 Montana 3440RL Legacy Edition, G614's, Pressure Pro TPMS, Dish Tailgaters
2016 GMC Sierra Denali 3500 CC SRW, Iridium Metallic, Duramax Allison Transmission
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11-20-2016, 12:06 AM
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#7
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Montana Fan
Join Date: Sep 2016
Location: West Melbourne
Posts: 314
M.O.C. #18980
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I sent an email to the factory trying to determine the same thing. The intelligent answer I received was that it did not matter, if cold turn them all on. The curious part is I have 3 unlabeled switches and 4 tanks... is one unheated or does one switch control 2 tanks?
__________________
Butch and Kathy
2016 3160RL Legacy, Sailun S637, Centramatic Balancers, 2-T105s, Amish Refrigeration, ARPrv, SoftStartRV, FlexArmor roof
2016 F350 6.7L SRW
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11-20-2016, 08:32 AM
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#8
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New Member
Join Date: Apr 2016
Location: Idaho Falls
Posts: 6
M.O.C. #18498
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Thank you!
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11-20-2016, 08:37 AM
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#9
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Montana Master
Join Date: Feb 2004
Location: Brandon
Posts: 3,944
M.O.C. #1034
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Guess the factory is right about turning them all on but a little more information and certainly labels wouldn't hurt.
__________________
Darwin & Maureen DeBackere
Minnedosa, Manitoba, Canada
2011/3500/Silverado/4x4/DRW/Duramax
2017/3721RL/Legacy Pkg./Pressure-Pro
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11-28-2016, 03:24 AM
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#10
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Montana Master
Join Date: May 2016
Location: Cuyahoga Falls
Posts: 721
M.O.C. #18572
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Quote:
quote:Originally posted by Butchy
I sent an email to the factory trying to determine the same thing. The intelligent answer I received was that it did not matter, if cold turn them all on. The curious part is I have 3 unlabeled switches and 4 tanks... is one unheated or does one switch control 2 tanks?
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Talked to a rep at Keystone. Service folks said they are not labeled because if it's cold enough to turn on tank heat, you turn them all on. Also one switch controls two tanks. The service department didn't know which switch went to which tank.
__________________
ATC/NAC Jerry A. Burkholder, USN (RET.)
Rule #1. The Chief is always right.
Rule #2. When in doubt, refer to rule #1.
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11-28-2016, 02:07 PM
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#11
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Site Team
Join Date: Aug 2007
Location: Omaha
Posts: 6,795
M.O.C. #7560
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Jerry- they more than likely can't give you an answer because it all depends who is hooking up the wires and which switch they put them on. I would guess it is luck of the draw on which one goes where! LOL
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12-09-2016, 11:50 AM
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#12
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Seasoned Camper
Join Date: Dec 2016
Location: Visalia
Posts: 68
M.O.C. #19277
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My recent purchase of the 3440RL also didnt have them labeled and since it doesnt drop down into the cold teens here or below, I just made up a label to attach to the switch plate "TANK HEATERS - DONT USE".. when I picked it up from the repair center, they had flipped them all ON and when tried to raise unit to hook up, Battery dead as a doornail..
__________________
John & Connie (52 yrs sofar)
Bailey & Sally (mutts)
2008 Dodge Ram 3500 4x4 DRW
2016 Montana 3440RL Legacy-Andersen 3200 Hitch
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04-16-2018, 07:06 PM
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#13
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Montana Fan
Join Date: Jul 2015
Location: LeRoy
Posts: 108
M.O.C. #17641
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If you don't have any fresh water in the tank that you are hauling with you, but you need the heaters for the grey and black tanks, seems like you'd need to know which ones to turn on or else the heater would be heating an empty tank, which I don't think would be good for the tank or the plastic. Am I right?
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04-17-2018, 12:11 PM
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#14
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Seasoned Camper
Join Date: Apr 2018
Location: Foristell
Posts: 76
M.O.C. #21573
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I was told that one tank controlled two tanks-I believe it was a grey galley and other grey tank for the shower and bathroom.
__________________
Rick and Jeanne
2013 F350 6.7 CC LB SRW
2018.5 Montana 3791RD
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04-17-2018, 01:17 PM
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#15
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Site Team
Join Date: Apr 2017
Location: Colorado Rockies
Posts: 1,989
M.O.C. #19755
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Quote:
Originally Posted by Meauwataka
If you don't have any fresh water in the tank that you are hauling with you, but you need the heaters for the grey and black tanks, seems like you'd need to know which ones to turn on or else the heater would be heating an empty tank, which I don't think would be good for the tank or the plastic. Am I right?
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I have three switches for the black and two gray tanks. I do not believe there is a heater on the fresh water tank.
__________________
Scott & Alta
2017 Montana 3160RL, Legacy, Onan 5.5Kw, Solar
2022 F-450 Lariat Ultimate
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04-18-2018, 05:55 AM
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#16
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Seasoned Camper
Join Date: Dec 2017
Location: WATERFORD
Posts: 82
M.O.C. #21009
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Our switches have a label on each one identifying the tank(s) they heat. Though I think it does make sense to turn then all on if you feel the need to have any of them on.
__________________
Steve and Mary Landry, Puppy Raisers for Leader Dogs for the Blind.
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04-18-2018, 06:21 AM
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#17
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Montana Master
Join Date: May 2011
Location: Hixson
Posts: 3,436
M.O.C. #11397
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Quote:
Originally Posted by scottz
I have three switches for the black and two gray tanks. I do not believe there is a heater on the fresh water tank.
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Mine are labeled from factory FRESH/BLACK/GRAY.
__________________
2018.5 Montana 3791RD
Full Timers 9/1/2010 through 1/16/2020.
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04-18-2018, 02:37 PM
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#18
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Montana Master
Join Date: Mar 2016
Location: Catoosa
Posts: 786
M.O.C. #18384
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Mine also are marked FRESH/BLACK/GREY. Would make no sense for the fresh not to have a heater, of course we are talking RV here
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04-18-2018, 08:29 PM
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#19
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Site Team
Join Date: Apr 2017
Location: Colorado Rockies
Posts: 1,989
M.O.C. #19755
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Quote:
Originally Posted by scottz
I have three switches for the black and two gray tanks. I do not believe there is a heater on the fresh water tank.
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Thanks for setting me straight. I checked and have three switches gray, black and fresh.
__________________
Scott & Alta
2017 Montana 3160RL, Legacy, Onan 5.5Kw, Solar
2022 F-450 Lariat Ultimate
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