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04-24-2016, 09:02 AM
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#1
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Established Member
Join Date: Jun 2012
Location: Beaumont
Posts: 29
M.O.C. #12599
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Water pump
2011 Montana 3400Rl Fresh water pump works, but runs continuously. Worked perfectly until today, normally would shut off when faucet was turned off. HELP
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04-24-2016, 09:44 AM
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#2
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Montana Master
Join Date: Nov 2002
Location: Hartselle
Posts: 977
M.O.C. #45
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Check tank fill valve in the convenience center. May have been switched.Don't ask how i know!
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04-24-2016, 10:51 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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Same here, been there and done that.
__________________
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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04-24-2016, 12:38 PM
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#4
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Montana Master
Join Date: Feb 2012
Location: Lake Gaston
Posts: 8,773
M.O.C. #12156
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Yup!!
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Mike and Lorraine
2002 3655 FL, 2005 3650RK
2010 3665RE, 2015 3910FB
F350 crew cab dually 6.7
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04-25-2016, 06:46 AM
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#5
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Montana Fan
Join Date: Aug 2015
Location: Leavenworth
Posts: 268
M.O.C. #17706
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Concur! I still do it frequently!
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Bill & Mary Van Nuys
Leavenworth, KS
2014 3735MK Legacy, Sailun 637s, TST 507RV TPMS, 2 Battle Born 100 AMP Lithium Batteries, Slide Toppers
2015 Chevy 3500 LTZ, 6.6L Duramax 4WD, CC, LB, SRW with Allison Transmission
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04-29-2016, 04:58 AM
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#6
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Established Member
Join Date: Jun 2012
Location: Beaumont
Posts: 29
M.O.C. #12599
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Check valve switch is in the correct position, any other ideas?
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04-29-2016, 06:31 AM
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#7
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Montana Master
Join Date: Jan 2016
Location: STAYTON
Posts: 1,118
M.O.C. #18157
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Quote:
quote:Originally posted by dykeleonard
Check valve switch is in the correct position, any other ideas?
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The diaphragm may be perforated, the only other reason would be it's not getting water, or there's an open line somewhere. A water heater that hasn't been purged of air or something like that. If the tank has water in it and the pump is working your issue will surely show up eventually. 
Mark
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“Hard times create strong men, strong men create good times, good times create weak men, and weak men create hard times.”
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04-29-2016, 06:32 AM
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#8
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Montana Master
Join Date: Sep 2014
Location: Full Timer In Naples, Florida
Posts: 1,049
M.O.C. #15731
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High pressure adjustment on the pump set too low.
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2017, 3500 Ram Big Horn, 4x4, Crew Cab, DRW, Aisin Transmission, 4:10. Curt Q20, 2014 Mountaineer 331 RLT, Sailun's on the rv and truck.
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04-29-2016, 10:21 AM
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#9
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Montana Master
Join Date: Sep 2013
Location: Pensacola (mail forward service)
Posts: 3,198
M.O.C. #13740
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If you pull the plastic wall off in the passthrough, you will see the pump and all the other fittings, lines, etc on the back side of the convenience center. Should be easy to see any issue. A pump that doesn't shut off means that it can't pressurize the water line coming out of the pump. Could be the pump output fitting isn't secure as should be, the pump has decided to bite it...could be that the water level in the fresh water tank is lower than the pickup so that you are now sucking air into the pump. I would add water to the tank first, then pull the plastic wall if need be. 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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04-29-2016, 10:59 AM
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#10
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Montana Master
Join Date: May 2010
Location: Rock Island
Posts: 1,074
M.O.C. #10457
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Since the fill valve switch is in the correct position it probably is as John posted about low level of water in fresh tank. Those two situations are the only times our pump will run continuously. Otherwise you have a loose fitting or blown line putting water out and not allowing system to pressurize.
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