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06-28-2020, 06:25 PM
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#1
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Senior Member
Join Date: Mar 2014
Location: Eastern U.P. of Michigan
Posts: 237
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Water heater
I noticed the last time we were out that the hot water was hotter than normal. I normally leave the electric switch to on when home in case we want hot water for something. Today I went inside and heard a noise coming from the water heater compartment. It sounded like the water was boiling. I switched off the switch and the noise went away. I didn't have time to further investigate.
Is there any adjustment on these things or does anyone have an idea where to start looking?
Tomorrow I'll fire up the gas side and see what happens. Same results, I'd say the thermostat dohicky is bad. Then again........
__________________
A rainy day campin' is better than a sunny day workin'.
'14 Montana High Country 305RL - Reese Goose Box - Morryde HD shackles & wet bolts - JoyRider shocks - JT StrongArms - Torklift steps - Correct Track - Progressive EMS-HW50C - Clear Source water filter - On The Go water softener
'21 Ram 3500 w/6.7 Cummins - Sinister Diesel oil bypass
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06-28-2020, 06:29 PM
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#2
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Site Team
Join Date: Jul 2014
Location: Modesto
Posts: 20,313
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RV water heaters are preset at the factory.
__________________
2012 Copper Canyon 273FWRET being towed by a 1994 Ford F350 CC,LB,Dually diesel.
Airlift 5000 bags, Prodigy brake control, 5 gauges on the pillar.Used to tow a '97 Jayco 323RKS.
Now an RVIA registered tech. Retired from Law enforcement in 2008 after 25+ yrs.
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06-28-2020, 06:31 PM
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#3
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Senior Member
Join Date: Mar 2014
Location: Eastern U.P. of Michigan
Posts: 237
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Hmmm...How do they preset them? This is a Dometic.
__________________
A rainy day campin' is better than a sunny day workin'.
'14 Montana High Country 305RL - Reese Goose Box - Morryde HD shackles & wet bolts - JoyRider shocks - JT StrongArms - Torklift steps - Correct Track - Progressive EMS-HW50C - Clear Source water filter - On The Go water softener
'21 Ram 3500 w/6.7 Cummins - Sinister Diesel oil bypass
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06-28-2020, 06:56 PM
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#4
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Senior Member
Join Date: Jul 2013
Location: Box Elder
Posts: 2,907
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Quote:
Originally Posted by Whitewolf
I noticed the last time we were out that the hot water was hotter than normal. I normally leave the electric switch to on when home in case we want hot water for something. Today I went inside and heard a noise coming from the water heater compartment. It sounded like the water was boiling. I switched off the switch and the noise went away. I didn't have time to further investigate.
Is there any adjustment on these things or does anyone have an idea where to start looking?
Tomorrow I'll fire up the gas side and see what happens. Same results, I'd say the thermostat dohicky is bad. Then again........
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The noise you heard was the water boiling at the electric element which is submerged in the water. This is normal and expected. There is an aftermarket thermostat available for the Dometic/Atwood water heater, but have no idea how well it works. The lower the temperature adjustment, the less hot water you effectively will have available because these RV water heaters are designed so you have to mix cold with hot so you have more hot water to take your shower. The Suburban water heater is the same, but I have not seen an after market thermostat for those. This is the adjustable thermostat that I've seen for the Dometic/Atwood water heater: https://www.dyersonline.com/dometic-...ostat-kit.html
__________________
Bob & Becky
2012 3402 Montana
2012 Chevy 2500HD D/A CC
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06-29-2020, 07:56 AM
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#5
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Senior Member
Join Date: Mar 2014
Location: Eastern U.P. of Michigan
Posts: 237
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We've had this unit for 6 years and I've never heard the water boil. And in my way of thinking, because of the temp at which water boils, it shouldn't boil. In the last week the water got hotter and hotter. I noticed the hot water lines extremely hot to the touch.
I tried calling Dometic and of course I can't get thru since I'm mot a dealer. I called where we bought this from and all service wanted to do was for them to look at it. They're 3 1/2 hours away. He mentioned it could be either the thermostat or the overheat fuse. He was very vague where that was at.
This is something I know I can fix. I've got two more dealers I can call that has done work on our unit and pick their brain.
I'd go ahead and order the part that Bobbecky had the link to, but I'd like to make sure that's the problem first.
__________________
A rainy day campin' is better than a sunny day workin'.
'14 Montana High Country 305RL - Reese Goose Box - Morryde HD shackles & wet bolts - JoyRider shocks - JT StrongArms - Torklift steps - Correct Track - Progressive EMS-HW50C - Clear Source water filter - On The Go water softener
'21 Ram 3500 w/6.7 Cummins - Sinister Diesel oil bypass
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06-29-2020, 08:20 AM
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#6
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Site Team
Join Date: Oct 2011
Location: Joppa, MD
Posts: 11,739
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What make/model water heater? They all have a thermostat to control the temperature but they are not adjustable. Some models you can buy a different thermostat preset but that's it, no adjustment.
__________________
Marshall
2012 Laredo 303 TG
2010 F250 LT Super Cab, long bed, 4X4, 6.4 Turbo Diesel
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06-29-2020, 03:11 PM
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#7
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Senior Member
Join Date: Mar 2014
Location: Eastern U.P. of Michigan
Posts: 237
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Atwood(Dometic)
__________________
A rainy day campin' is better than a sunny day workin'.
'14 Montana High Country 305RL - Reese Goose Box - Morryde HD shackles & wet bolts - JoyRider shocks - JT StrongArms - Torklift steps - Correct Track - Progressive EMS-HW50C - Clear Source water filter - On The Go water softener
'21 Ram 3500 w/6.7 Cummins - Sinister Diesel oil bypass
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06-29-2020, 03:38 PM
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#8
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Senior Member
Join Date: Mar 2014
Location: Eastern U.P. of Michigan
Posts: 237
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__________________
A rainy day campin' is better than a sunny day workin'.
'14 Montana High Country 305RL - Reese Goose Box - Morryde HD shackles & wet bolts - JoyRider shocks - JT StrongArms - Torklift steps - Correct Track - Progressive EMS-HW50C - Clear Source water filter - On The Go water softener
'21 Ram 3500 w/6.7 Cummins - Sinister Diesel oil bypass
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06-29-2020, 04:02 PM
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#9
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Site Team
Join Date: Oct 2011
Location: Joppa, MD
Posts: 11,739
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I'd suggest giving Dometic a call and get the part number before you order one. From what I've found they are under $15 but didn't find one for that model number.
__________________
Marshall
2012 Laredo 303 TG
2010 F250 LT Super Cab, long bed, 4X4, 6.4 Turbo Diesel
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06-29-2020, 04:30 PM
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#10
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Site Team
Join Date: Feb 2014
Location: W. Texas
Posts: 17,660
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Quote:
Originally Posted by Whitewolf
We've had this unit for 6 years and I've never heard the water boil. And in my way of thinking, because of the temp at which water boils, it shouldn't boil. In the last week the water got hotter and hotter. I noticed the hot water lines extremely hot to the touch.
I tried calling Dometic and of course I can't get thru since I'm mot a dealer. I called where we bought this from and all service wanted to do was for them to look at it. They're 3 1/2 hours away. He mentioned it could be either the thermostat or the overheat fuse. He was very vague where that was at.
This is something I know I can fix. I've got two more dealers I can call that has done work on our unit and pick their brain.
I'd go ahead and order the part that Bobbecky had the link to, but I'd like to make sure that's the problem first.
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You might give Dometic another call....or 2. I've called them a few times in the past and they have been johnny on the spot and very helpful, but that was before the covid debacle we are living through.
__________________
Danny and Susan, wife of 56 years
2019 Ram 3500 Laramie CC SWB SB 6.4 4x4 4.10
2020 Montana High Country 331RL
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06-29-2020, 04:42 PM
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#11
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Senior Member
Join Date: Apr 2019
Location: Henniker
Posts: 2,127
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I had no issues reaching friendly people at Dometic when I called with a recent igniter board failure. They walked me through a quick troubleshooting of the board and I was able to pick up a replacement at a local authorized service center.
__________________
Rob & Amy
2019 Passport 240BH SL (current)
2024 Cougar 29BHL (on order, due early May)
2022 Ford F250 7.3L Godzilla Crew Cab FX4
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06-29-2020, 05:32 PM
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#12
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Senior Member
Join Date: Mar 2014
Location: Eastern U.P. of Michigan
Posts: 237
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What number did you guys call? One I found wanted my dealer number. The other went to a fast busy signal. Most likely disconnected. All I could find was an email form to send them.
Flybouy - I searched all the number closely before I found it. Second to last. At first I didn't think it was there.
__________________
A rainy day campin' is better than a sunny day workin'.
'14 Montana High Country 305RL - Reese Goose Box - Morryde HD shackles & wet bolts - JoyRider shocks - JT StrongArms - Torklift steps - Correct Track - Progressive EMS-HW50C - Clear Source water filter - On The Go water softener
'21 Ram 3500 w/6.7 Cummins - Sinister Diesel oil bypass
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