Journey with Confidence RV GPS App RV Trip Planner RV LIFE Campground Reviews RV Maintenance Take a Speed Test Free 7 Day Trial ×


Reply
 
Thread Tools Display Modes
Old 11-26-2022, 08:40 AM   #1
Junior Member
 
Join Date: Nov 2022
Posts: 4
Dometic water heater thermal fuse trips on electric

Hello, I'll start off my saying we're full timers so we use our hot water tank on a pretty constant basis. So far we're about 2 months in and been through about 3 or 4 thermal fuses. The strangest part though is that they end up being triggered while we're using electric as we rarely used propane for the water heater until recently. The tank in question is a Dometic WH-6GEA.
Each time there's been an issue replacing the thermal fuse has restored operation. And as you may expect as a result when the electric wasn't working neither was the propane due to the fuse being blown. Pretty much everything I've read though suggests that the thermal fuse is intended as a safety mechanism for the propane operation of the tank though so I'm having trouble figuring out what the issue actually is that's tripping the fuse in the first place.
Does anyone have any insight into what I should actually be looking for?
I guess for additional detail I've switched over to using propane and haven't had any issues so far, though because we're concerned about the fuse blowing we only run the propane when we know we're going to use the hot water immediately.
Styoung is offline   Reply With Quote
Old 11-26-2022, 09:37 AM   #2
Site Team
 
wmtire's Avatar
 
Join Date: Nov 2010
Location: Northeast Louisiana
Posts: 30,961
See page 17 here on the owners manual for your water heater we keep in the library section. This manual also has wiring schematics for your water heater

https://www.forestriverforums.com/fo...do=file&id=264
Attached Thumbnails
Click image for larger version

Name:	Screenshot 2022-11-26 at 08-36-14 Dometic L.P. Gas Water Heater - 3317866_85012.pdf.png
Views:	20
Size:	116.9 KB
ID:	281838  
__________________
2011 Flagstaff 831 RLBSS

I'm trying to write a self-help book but I'm struggling. Any advice?
wmtire is offline   Reply With Quote
Old 11-26-2022, 09:39 AM   #3
Site Team
 
KyDan's Avatar
 
Join Date: Mar 2008
Location: Louisville, KY
Posts: 10,257
Welcome to FRF!
A quick google search found this thread in another forum... but it's helpful I think.
https://gdrvowners.com/forum/operati...-thermal-fuses
See post #9 especially.
Good luck!!
__________________
Peace!
Dan & Rita D
2017 Nissan Titan 5.6L King cab 4wd
2016 Evergreen Everlite 242RBS
29' empty nest model. Blue Ox WD hitch
(1 queen bed, large main cabin and huge bathroom)
Camping days 2010-53, 2011-47, 2012-41, 2013-41, 2014-31, 2015-40, 2016-44, 2017-63, 2018-75, 2019-32, 2020-41, 2021-49, 2022-43
KyDan is offline   Reply With Quote
Old 11-26-2022, 10:52 AM   #4
Junior Member
 
Join Date: Nov 2022
Posts: 4
Quote:
Originally Posted by KyDan View Post
Welcome to FRF!
A quick google search found this thread in another forum... but it's helpful I think.
https://gdrvowners.com/forum/operati...-thermal-fuses
See post #9 especially.
Good luck!!
Thanks! I did see this post, but unless I completely misunderstood it this still relates to a problem with the gas portion triggering the fuse since they talk about the burner tube.
My problem stems from running it on only electric and somehow the cutoff being triggered
Styoung is offline   Reply With Quote
Old 11-26-2022, 03:13 PM   #5
Senior Member
 
Join Date: Jan 2018
Location: Raleigh, NC
Posts: 6,676
How hot?

Quote:
Originally Posted by Styoung View Post
Thanks! I did see this post, but unless I completely misunderstood it this still relates to a problem with the gas portion triggering the fuse since they talk about the burner tube.
My problem stems from running it on only electric and somehow the cutoff being triggered
How hot does the water get? Dangerously hot?
If the electrical-side thermostat is defective and lets the water get dangerously hot, the thermal fuse will open. A defective thermostat will continue to blow thermal fuses.
__________________
Larry

Sticks and Bricks: Raleigh, NC
2008 Cherokee 38P: at Ivor, VA permanently
Larry-NC is offline   Reply With Quote
Old 11-26-2022, 03:41 PM   #6
Junior Member
 
Join Date: Nov 2022
Posts: 4
Quote:
Originally Posted by Larry-NC View Post
How hot does the water get? Dangerously hot?
If the electrical-side thermostat is defective and lets the water get dangerously hot, the thermal fuse will open. A defective thermostat will continue to blow thermal fuses.
When the electric side was was running I would certainly describe it as very hot. Near scalding in instances for sure. Maybe I'll try replacing the thermostat and see how that goes
Styoung is offline   Reply With Quote
Old 11-26-2022, 04:25 PM   #7
Site Team
 
KyDan's Avatar
 
Join Date: Mar 2008
Location: Louisville, KY
Posts: 10,257
Quote:
Originally Posted by Styoung View Post
When the electric side was was running I would certainly describe it as very hot. Near scalding in instances for sure. Maybe I'll try replacing the thermostat and see how that goes

That's what I would try next! Fairly simple and not too expensive.
Please let us know how that works.
__________________
Peace!
Dan & Rita D
2017 Nissan Titan 5.6L King cab 4wd
2016 Evergreen Everlite 242RBS
29' empty nest model. Blue Ox WD hitch
(1 queen bed, large main cabin and huge bathroom)
Camping days 2010-53, 2011-47, 2012-41, 2013-41, 2014-31, 2015-40, 2016-44, 2017-63, 2018-75, 2019-32, 2020-41, 2021-49, 2022-43
KyDan is offline   Reply With Quote
Old 12-05-2022, 08:19 AM   #8
Junior Member
 
Join Date: Nov 2022
Posts: 4
Quote:
Originally Posted by KyDan View Post
That's what I would try next! Fairly simple and not too expensive.
Please let us know how that works.
Sorry for the slow update took awhile to get the part and all that fun. I've had the new thermostat installed for about 24 hours now and so far no issues! Before it was triggering the thermal fuse within just a few hours so I'll take that as a good sign. Appreciate the help guys!
Styoung is offline   Reply With Quote
Reply

Tags
dometic, electric, fuse, heater, water, water heater

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


» Featured Campgrounds

Reviews provided by

Disclaimer:

This website is not affiliated with or endorsed by Forest River, Inc. or any of its affiliates. This is an independent, unofficial site.



All times are GMT -5. The time now is 04:21 AM.